Bump grpc.version from 1.68.0 to 1.68.1

Bumps `grpc.version` from 1.68.0 to 1.68.1.

Updates `io.grpc:grpc-protobuf` from 1.68.0 to 1.68.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.68.0...v1.68.1)

Updates `io.grpc:grpc-stub` from 1.68.0 to 1.68.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.68.0...v1.68.1)

Updates `io.grpc:grpc-testing` from 1.68.0 to 1.68.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.68.0...v1.68.1)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.grpc:grpc-stub
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.grpc:grpc-testing
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

astra/pom.xml

@@ -18,7 +18,7 @@
         <uberjar.name>astra</uberjar.name>
         <http.core.version>4.4.16</http.core.version>
         <protobuf.version>3.25.5</protobuf.version>
-        <grpc.version>1.68.0</grpc.version>
+        <grpc.version>1.68.1</grpc.version>
         <micrometer.version>1.13.6</micrometer.version>
         <armeria.version>1.27.3</armeria.version>
         <kafka.version>3.5.0</kafka.version>