Update dependency protobuf to v6.30.2

| datasource | package  | from   | to     |
| ---------- | -------- | ------ | ------ |
| pypi       | protobuf | 6.30.1 | 6.30.2 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/requirements.ci.txt

@@ -1,6 +1,6 @@
 docker==7.1.0
 grpcio==1.71.0
-protobuf==6.30.1
+protobuf==6.30.2
 requests==2.32.3
 urllib3==2.3.0
 websocket-client==1.8.0