Bump the load-gen-gradle-deps group in /load-generator with 3 updates

Bumps the load-gen-gradle-deps group in /load-generator with 3 updates: [io.grpc:grpc-bom](https://github.com/grpc/grpc-java), [io.grpc:grpc-api](https://github.com/grpc/grpc-java) and [io.grpc:grpc-netty-shaded](https://github.com/grpc/grpc-java).


Updates `io.grpc:grpc-bom` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

Updates `io.grpc:grpc-api` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

Updates `io.grpc:grpc-netty-shaded` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
- dependency-name: io.grpc:grpc-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
- dependency-name: io.grpc:grpc-netty-shaded
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
...

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

load-generator/build.gradle

@@ -28,10 +28,10 @@ dependencies {
     // This dependency is used by the application.
     implementation "com.google.guava:guava:32.1.3-jre"
 
-    implementation "io.grpc:grpc-bom:1.59.0"
-    implementation "io.grpc:grpc-api:1.59.0"
+    implementation "io.grpc:grpc-bom:1.59.1"
+    implementation "io.grpc:grpc-api:1.59.1"
 
-    implementation "io.grpc:grpc-netty-shaded:1.59.0"
+    implementation "io.grpc:grpc-netty-shaded:1.59.1"
 
     implementation platform("io.opentelemetry:opentelemetry-bom:1.32.0")
     implementation "io.opentelemetry:opentelemetry-api"