build(deps): bump setuptools in /examples/grpc-bridge/client

Bumps [setuptools](https://github.com/pypa/setuptools) from 68.2.2 to 70.0.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v68.2.2...v70.0.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: indirect
...

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

examples/grpc-bridge/client/requirements.txt

@@ -247,7 +247,7 @@ urllib3==2.0.7 \
     # via requests
 
 # The following packages are considered to be unsafe in a requirements file:
-setuptools==68.2.2 \
-    --hash=sha256:4ac1475276d2f1c48684874089fefcd83bd7162ddaafb81fac866ba0db282a87 \
-    --hash=sha256:b454a35605876da60632df1a60f736524eb73cc47bbc9f3f1ef1b644de74fd2a
+setuptools==70.0.0 \
+    --hash=sha256:54faa7f2e8d2d11bcd2c07bed282eef1046b5c080d1c32add737d7b5817b1ad4 \
+    --hash=sha256:f211a66637b8fa059bb28183da127d4e86396c991a942b028c6650d4319c3fd0
     # via grpcio-tools