Bump io.grpc:grpc-bom from 1.68.1 to 1.68.2 (#2069)

Bumps [io.grpc:grpc-bom](https://github.com/grpc/grpc-java) from 1.68.1 to 1.68.2.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.68.1...v1.68.2)

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

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

Author: dependabot[bot]

tika-grpc/pom.xml

@@ -34,7 +34,7 @@
   </parent>
 
   <properties>
-    <grpc.version>1.68.1</grpc.version>
+    <grpc.version>1.68.2</grpc.version>
     <protoc.version>3.25.3</protoc.version>
     <asarkar-grpc-test.version>1.2.2</asarkar-grpc-test.version>
     <awaitility.version>4.2.2</awaitility.version>