Bump io.grpc:grpc-bom from 1.69.1 to 1.70.0 (#892)

Bumps [io.grpc:grpc-bom](https://github.com/grpc/grpc-java) from 1.69.1 to 1.70.0.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.69.1...v1.70.0)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -317,7 +317,7 @@
         <maven.compiler.target>${java.version}</maven.compiler.target>
 
         <protobuf.version>4.29.3</protobuf.version>
-        <grpc.version>1.69.1</grpc.version>
+        <grpc.version>1.70.0</grpc.version>
     </properties>
 
 </project>