chore(deps): bump grpc in /hiero-dependency-versions

Bumps `grpc` from 1.69.1 to 1.70.0.

Updates `io.grpc:grpc-api` 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)

Updates `io.grpc:grpc-inprocess` 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)

Updates `io.grpc:grpc-protobuf-lite` 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)

Updates `io.grpc:grpc-protobuf` 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)

Updates `io.grpc:grpc-stub` 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)

Updates `io.grpc:grpc-netty` 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)

Updates `io.grpc:grpc-netty-shaded` 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)

Updates `io.grpc:grpc-okhttp` 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)

Updates `io.grpc:protoc-gen-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-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-inprocess
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-protobuf-lite
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-protobuf
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-stub
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-netty
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-netty-shaded
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:grpc-okhttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.grpc:protoc-gen-grpc-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

hiero-dependency-versions/build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 group = "org.hiero"
 
 val bouncycastle = "1.80"
-val grpc = "1.69.1"
+val grpc = "1.70.0"
 val protobuf = "4.29.3"
 val slf4j = "2.0.16"