chore: bump io.grpc:grpc-bom in the grpc group across 1 directory

Bumps the grpc group with 1 update in the / directory: [io.grpc:grpc-bom](https://github.com/grpc/grpc-java).


Updates `io.grpc:grpc-bom` from 1.77.0 to 1.81.0
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.77.0...v1.81.0)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-bom
  dependency-version: 1.80.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: grpc
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -38,7 +38,7 @@
 
 
     <properties>
-        <grpc.version>1.77.0</grpc.version>
+        <grpc.version>1.81.0</grpc.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven-clean-plugin.version>3.5.0</maven-clean-plugin.version>
         <maven-compiler-plugin.version>3.15.0</maven-compiler-plugin.version>