Bump grpc-protobuf in /archived/memorystore-oc/java (#2411)

Bumps [grpc-protobuf](https://github.com/grpc/grpc-java) from 1.15.1 to 1.53.0.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.15.1...v1.53.0)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-protobuf
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

archived/memorystore-oc/java/pom.xml

@@ -35,7 +35,7 @@
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>1.15.1</version>
+      <version>1.53.0</version>
     </dependency>
     <dependency>
       <groupId>io.opencensus</groupId>