fix: typos in some proto comments (#1563)

schema/google/showcase/v1beta1/compliance.proto

@@ -102,7 +102,7 @@ service Compliance {
   }
 
   // This method requests an enum value from the server. Depending on the contents of EnumRequest, the enum value returned will be a known enum declared in the
-  // .proto file, or a made-up enum value the is unknown to the client. To verify that clients can round-trip unknown enum vaues they receive, use the
+  // .proto file, or a made-up enum value the is unknown to the client. To verify that clients can round-trip unknown enum values they receive, use the
   // response from this RPC as the request to VerifyEnum()
   //
   // The values of enums sent by the server when a known or unknown value is requested will be the same within a single Showcase server run (this is needed for
@@ -256,7 +256,7 @@ enum Continent {
 
 
 message EnumRequest {
-  // Whether the client is requesting a new, unknown enum value or a known enum value already declard in this proto file.
+  // Whether the client is requesting a new, unknown enum value or a known enum value already declared in this proto file.
   bool unknown_enum = 1;
 }
 

schema/google/showcase/v1beta1/messaging.proto

@@ -361,7 +361,7 @@ message UpdateBlurbRequest {
   // The blurb to update.
   Blurb blurb = 1;
 
-  // The field mask to determine wich fields are to be updated. If empty, the
+  // The field mask to determine which fields are to be updated. If empty, the
   // server will assume all fields are to be updated.
   google.protobuf.FieldMask update_mask = 2;
 }
@@ -379,7 +379,7 @@ message DeleteBlurbRequest {
 // The request message for the google.showcase.v1beta1.Messaging\ListBlurbs
 // method.
 message ListBlurbsRequest {
-  // The resource name of the requested room or profile whos blurbs to list.
+  // The resource name of the requested room or profile who blurbs to list.
   string parent = 1 [
     (google.api.resource_reference).child_type =
         "showcase.googleapis.com/Blurb",