chore(deps): bump grpc from 1.72.0 to 1.73.0 in /http2/ruby-grpc

Bumps [grpc](https://github.com/google/grpc) from 1.72.0 to 1.73.0.
- [Release notes](https://github.com/google/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.72.0...v1.73.0)

---
updated-dependencies:
- dependency-name: grpc
  dependency-version: 1.73.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

http2/ruby-grpc/Gemfile.lock

@@ -1,17 +1,17 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    bigdecimal (3.1.9)
-    google-protobuf (4.30.2)
+    bigdecimal (3.2.2)
+    google-protobuf (4.31.1)
       bigdecimal
       rake (>= 13)
     googleapis-common-protos-types (1.20.0)
       google-protobuf (>= 3.18, < 5.a)
-    grpc (1.72.0)
+    grpc (1.73.0)
       google-protobuf (>= 3.25, < 5.0)
       googleapis-common-protos-types (~> 1.0)
     grpc-tools (1.73.0)
-    rake (13.2.1)
+    rake (13.3.0)
 
 PLATFORMS
   ruby