Bump io.github.ascopes:protobuf-maven-plugin in /samples/grpc-client

Bumps [io.github.ascopes:protobuf-maven-plugin](https://github.com/ascopes/protobuf-maven-plugin) from 3.8.0 to 3.10.2.
- [Release notes](https://github.com/ascopes/protobuf-maven-plugin/releases)
- [Commits](ascopes/protobuf-maven-plugin@v3.8.0...v3.10.2)

---
updated-dependencies:
- dependency-name: io.github.ascopes:protobuf-maven-plugin
  dependency-version: 3.10.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

samples/grpc-client/pom.xml

@@ -121,7 +121,7 @@
 			<plugin>
 				<groupId>io.github.ascopes</groupId>
 				<artifactId>protobuf-maven-plugin</artifactId>
-				<version>3.8.0</version>
+				<version>3.10.2</version>
 				<configuration>
 					<protocVersion>${protobuf-java.version}</protocVersion>
 					<binaryMavenPlugins>