chore: regens API reference docs (#889)

diff --git a/docs/dyn/firebaserules_v1.projects.rulesets.html b/docs/dyn/firebaserules_v1.projects.rulesets.html
index 3272a57..12eee95 100644
--- a/docs/dyn/firebaserules_v1.projects.rulesets.html
+++ b/docs/dyn/firebaserules_v1.projects.rulesets.html
@@ -75,7 +75,7 @@
 <h1><a href="firebaserules_v1.html">Firebase Rules API</a> . <a href="firebaserules_v1.projects.html">projects</a> . <a href="firebaserules_v1.projects.rulesets.html">rulesets</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Create a `Ruleset` from `Source`.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
@@ -91,7 +91,7 @@
 <p class="firstline">Retrieves the next page of results.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(name, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(name, body=None, x__xgafv=None)</code>
   <pre>Create a `Ruleset` from `Source`.
 
 The `Ruleset` is given a unique generated name which is returned to the
@@ -103,7 +103,7 @@
   name: string, Resource name for Project which owns this `Ruleset`.
 
 Format: `projects/{project_id}` (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # `Ruleset` is an immutable copy of `Source` with a globally unique identifier
@@ -117,11 +117,18 @@
         },
       ],
     },
-    "createTime": "A String", # Time the `Ruleset` was created.
-        # Output only.
     "name": "A String", # Name of the `Ruleset`. The ruleset_id is auto generated by the service.
         # Format: `projects/{project_id}/rulesets/{ruleset_id}`
         # Output only.
+    "createTime": "A String", # Time the `Ruleset` was created.
+        # Output only.
+    "metadata": { # Metadata for a Ruleset. # The metadata for this ruleset.
+        # Output only.
+      "services": [ # Services that this ruleset has declarations for (e.g.,
+          # "cloud.firestore"). There may be 0+ of these.
+        "A String",
+      ],
+    },
   }
 
   x__xgafv: string, V1 error format.
@@ -143,11 +150,18 @@
           },
         ],
       },
-      "createTime": "A String", # Time the `Ruleset` was created.
-          # Output only.
       "name": "A String", # Name of the `Ruleset`. The ruleset_id is auto generated by the service.
           # Format: `projects/{project_id}/rulesets/{ruleset_id}`
           # Output only.
+      "createTime": "A String", # Time the `Ruleset` was created.
+          # Output only.
+      "metadata": { # Metadata for a Ruleset. # The metadata for this ruleset.
+          # Output only.
+        "services": [ # Services that this ruleset has declarations for (e.g.,
+            # "cloud.firestore"). There may be 0+ of these.
+          "A String",
+        ],
+      },
     }</pre>
 </div>
 
@@ -208,11 +222,18 @@
           },
         ],
       },
-      "createTime": "A String", # Time the `Ruleset` was created.
-          # Output only.
       "name": "A String", # Name of the `Ruleset`. The ruleset_id is auto generated by the service.
           # Format: `projects/{project_id}/rulesets/{ruleset_id}`
           # Output only.
+      "createTime": "A String", # Time the `Ruleset` was created.
+          # Output only.
+      "metadata": { # Metadata for a Ruleset. # The metadata for this ruleset.
+          # Output only.
+        "services": [ # Services that this ruleset has declarations for (e.g.,
+            # "cloud.firestore"). There may be 0+ of these.
+          "A String",
+        ],
+      },
     }</pre>
 </div>
 
@@ -243,7 +264,7 @@
 Filters on `Ruleset.create_time` should use the `date` function which
 parses strings that conform to the RFC 3339 date/time specifications.
 
-Example: `create_time > date("2017-01-01T00:00:00Z") AND name=UUID-*`
+Example: `create_time &gt; date("2017-01-01T00:00:00Z") AND name=UUID-*`
 
 Returns:
   An object of the form:
@@ -263,11 +284,18 @@
               },
             ],
           },
-          "createTime": "A String", # Time the `Ruleset` was created.
-              # Output only.
           "name": "A String", # Name of the `Ruleset`. The ruleset_id is auto generated by the service.
               # Format: `projects/{project_id}/rulesets/{ruleset_id}`
               # Output only.
+          "createTime": "A String", # Time the `Ruleset` was created.
+              # Output only.
+          "metadata": { # Metadata for a Ruleset. # The metadata for this ruleset.
+              # Output only.
+            "services": [ # Services that this ruleset has declarations for (e.g.,
+                # "cloud.firestore"). There may be 0+ of these.
+              "A String",
+            ],
+          },
         },
     ],
   }</pre>