deps: google-common-protos 2.8.4 (#863)

Author: suztomo

first-party-dependencies/pom.xml

@@ -61,7 +61,7 @@
  <guava.version>31.1-jre</guava.version>
  <protobuf.version>3.19.6</protobuf.version>
  <google.api-common.version>2.1.5</google.api-common.version>
- <google.common-protos.version>2.8.3</google.common-protos.version>
+ <google.common-protos.version>2.8.4</google.common-protos.version>
  <google.core.version>2.6.0</google.core.version>
  <google.auth.version>1.6.0</google.auth.version>
  <google.http-client.version>1.41.7</google.http-client.version>