build: run docs regen in synth.py (#1059)

diff --git a/docs/dyn/compute_alpha.routes.html b/docs/dyn/compute_alpha.routes.html
index 7caa10f..9423b0b 100644
--- a/docs/dyn/compute_alpha.routes.html
+++ b/docs/dyn/compute_alpha.routes.html
@@ -200,7 +200,8 @@
     "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?`. The first character must be a lowercase letter, and all following characters (except for the last character) must be a dash, lowercase letter, or digit. The last character must be a lowercase letter or digit.
     "network": "A String", # Fully-qualified URL of the network that this route applies to.
     "nextHopGateway": "A String", # The URL to a gateway that should handle matching packets. You can only specify the internet gateway using a full or partial valid URL:  projects/project/global/gateways/default-internet-gateway
-    "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets. You can only specify the forwarding rule as a partial or full URL. For example, the following are all valid URLs:
+    "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets or the IP address of the forwarding Rule. For example, the following are all valid URLs:
+        # - 10.128.0.56
         # - https://www.googleapis.com/compute/v1/projects/project/regions/region/forwardingRules/forwardingRule
         # - regions/region/forwardingRules/forwardingRule
     "nextHopInstance": "A String", # The URL to an instance that should handle matching packets. You can specify this as a full or partial URL. For example:
@@ -252,7 +253,8 @@
   "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?`. The first character must be a lowercase letter, and all following characters (except for the last character) must be a dash, lowercase letter, or digit. The last character must be a lowercase letter or digit.
   "network": "A String", # Fully-qualified URL of the network that this route applies to.
   "nextHopGateway": "A String", # The URL to a gateway that should handle matching packets. You can only specify the internet gateway using a full or partial valid URL:  projects/project/global/gateways/default-internet-gateway
-  "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets. You can only specify the forwarding rule as a partial or full URL. For example, the following are all valid URLs:
+  "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets or the IP address of the forwarding Rule. For example, the following are all valid URLs:
+      # - 10.128.0.56
       # - https://www.googleapis.com/compute/v1/projects/project/regions/region/forwardingRules/forwardingRule
       # - regions/region/forwardingRules/forwardingRule
   "nextHopInstance": "A String", # The URL to an instance that should handle matching packets. You can specify this as a full or partial URL. For example:
@@ -392,7 +394,8 @@
         "name": "A String", # Name of the resource. Provided by the client when the resource is created. The name must be 1-63 characters long, and comply with RFC1035. Specifically, the name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?`. The first character must be a lowercase letter, and all following characters (except for the last character) must be a dash, lowercase letter, or digit. The last character must be a lowercase letter or digit.
         "network": "A String", # Fully-qualified URL of the network that this route applies to.
         "nextHopGateway": "A String", # The URL to a gateway that should handle matching packets. You can only specify the internet gateway using a full or partial valid URL:  projects/project/global/gateways/default-internet-gateway
-        "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets. You can only specify the forwarding rule as a partial or full URL. For example, the following are all valid URLs:
+        "nextHopIlb": "A String", # The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets or the IP address of the forwarding Rule. For example, the following are all valid URLs:
+            # - 10.128.0.56
             # - https://www.googleapis.com/compute/v1/projects/project/regions/region/forwardingRules/forwardingRule
             # - regions/region/forwardingRules/forwardingRule
         "nextHopInstance": "A String", # The URL to an instance that should handle matching packets. You can specify this as a full or partial URL. For example: