Add protobuf repo to known_contributing_modules on maven.install

Author: aaliddell

modules/java/MODULE.bazel

@@ -31,6 +31,7 @@ maven.install(
         "javax.annotation:javax.annotation-api:1.3.2",
     ],
     known_contributing_modules = [
+        "protobuf",
         "rules_proto_grpc_java",
         "rules_proto_grpc_scala",
     ],

modules/scala/MODULE.bazel

@@ -17,6 +17,7 @@ maven.install(
         # These are inherited from rules_proto_grpc_java, only add anything extra here
     ],
     known_contributing_modules = [
+        "protobuf",
         "rules_proto_grpc_java",
         "rules_proto_grpc_scala",
     ],

test_workspaces/java_deps/MODULE.bazel

@@ -27,6 +27,7 @@ maven.install(
     known_contributing_modules = [
         # Supress warning about multiple contributing modules
         "",
+        "protobuf",
         "rules_proto_grpc_java",
     ],
 )