deps: update dependency io.grpc:grpc-bom to v1.51.0 (#919)

Author: renovate-bot

Diff for: first-party-dependencies/pom.xml

@@ -55,7 +55,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <site.installationModule>${project.artifactId}</site.installationModule>
-    <grpc.version>1.50.2</grpc.version>
+    <grpc.version>1.51.0</grpc.version>
     <gax.version>2.19.5</gax.version>
     <grpc-gcp.version>1.3.1</grpc-gcp.version>
     <gson.version>2.10</gson.version>