chore: Update discovery artifacts (#1618)

## Deleted keys were detected in the following stable discovery artifacts:
compute v1 https://github.com/googleapis/google-api-python-client/commit/834349f1c54a0be33fb55e3328f88f25fa6a9419

## Deleted keys were detected in the following pre-stable discovery artifacts:
compute alpha https://github.com/googleapis/google-api-python-client/commit/834349f1c54a0be33fb55e3328f88f25fa6a9419
compute beta https://github.com/googleapis/google-api-python-client/commit/834349f1c54a0be33fb55e3328f88f25fa6a9419

## Discovery Artifact Change Summary:
feat(analyticsadmin): update the api https://github.com/googleapis/google-api-python-client/commit/835ba4092c656966ec26ec08f6be20d5d1abcf43
feat(bigquery): update the api https://github.com/googleapis/google-api-python-client/commit/6abccd47e1e537bbc46447acf1495a610c3dae31
feat(chat): update the api https://github.com/googleapis/google-api-python-client/commit/f5a2e18eebb360f0b416765166303d362944130f
feat(cloudasset): update the api https://github.com/googleapis/google-api-python-client/commit/d3602dbfbb01eda58b5930bf17f8fbdfaad1e6cf
feat(cloudkms): update the api https://github.com/googleapis/google-api-python-client/commit/a3343e30f99a8250ac4dffc401e3106b21e59c13
feat(composer): update the api https://github.com/googleapis/google-api-python-client/commit/614167472dc908fa47eec9a0921b9538ba068066
feat(compute): update the api https://github.com/googleapis/google-api-python-client/commit/834349f1c54a0be33fb55e3328f88f25fa6a9419
feat(contactcenterinsights): update the api https://github.com/googleapis/google-api-python-client/commit/5482a0bade7167307dbbd81455c023a685318227
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/361134dcbcca446cb9e2b004006f3feb1920fd93
feat(displayvideo): update the api https://github.com/googleapis/google-api-python-client/commit/4d43cceda82a1df22fad872e85e1b7236e239ae8
feat(orgpolicy): update the api https://github.com/googleapis/google-api-python-client/commit/ce6c8aad2d1e8f7d6325c2642f61c07e22fddb5c
feat(prod_tt_sasportal): update the api https://github.com/googleapis/google-api-python-client/commit/dbbe2a7c7d9d43564d4032d109dc5e83d4864e84
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/4e21ee29bc68bb989519460ede52c04cc66f203e
feat(vmmigration): update the api https://github.com/googleapis/google-api-python-client/commit/8898d540b6ac5801da6854209ff3dee1af7dc176
feat(websecurityscanner): update the api https://github.com/googleapis/google-api-python-client/commit/bb0332e672950a3fbdfe0d383d948a4925bd433f
diff --git a/docs/dyn/spanner_v1.projects.instances.html b/docs/dyn/spanner_v1.projects.instances.html
index 145c60b..26f4c68 100644
--- a/docs/dyn/spanner_v1.projects.instances.html
+++ b/docs/dyn/spanner_v1.projects.instances.html
@@ -251,7 +251,7 @@
 
 { # Request message for `GetIamPolicy` method.
   "options": { # Encapsulates settings provided to GetIamPolicy. # OPTIONAL: A `GetPolicyOptions` object for specifying options to `GetIamPolicy`.
-    "requestedPolicyVersion": 42, # Optional. The policy format version to be returned. Valid values are 0, 1, and 3. Requests specifying an invalid value will be rejected. Requests for policies with any conditional bindings must specify version 3. Policies without any conditional bindings may specify any valid value or leave the field unset. To learn which resources support conditions in their IAM policies, see the [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+    "requestedPolicyVersion": 42, # Optional. The maximum policy version that will be used to format the policy. Valid values are 0, 1, and 3. Requests specifying an invalid value will be rejected. Requests for policies with any conditional role bindings must specify version 3. Policies with no conditional role bindings may specify any valid value or leave the field unset. The policy in the response might use the policy version that you specified, or it might use a lower policy version. For example, if you specify version 3, but the policy has no conditional role bindings, the response uses version 1. To learn which resources support conditions in their IAM policies, see the [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
   },
 }