chore(deps): update dependency com.google.protobuf:protobuf-java to v3.21.12 (#2231)

Author: renovate-bot

pom.xml

@@ -511,7 +511,7 @@
     <project.oauth.version>1.34.1</project.oauth.version>
     <project.jsr305.version>3.0.2</project.jsr305.version>
     <project.gson.version>2.8.6</project.gson.version>
-    <project.protobuf-java.version>3.21.9</project.protobuf-java.version>
+    <project.protobuf-java.version>3.21.12</project.protobuf-java.version>
     <project.guava.version>31.1-jre</project.guava.version>
     <project.appengine.version>2.0.10</project.appengine.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>