Bump protobuf (#982)

Bumps the pip group with 1 update in the /ci/test-space-egress directory: [protobuf](https://github.com/protocolbuffers/protobuf).


Updates `protobuf` from 3.18.3 to 4.25.8
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.18.3...v4.25.8)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-version: 4.25.8
  dependency-type: direct:production
  dependency-group: pip
...

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Author: dependabot[bot]

ci/test-space-egress/requirements.txt

@@ -13,7 +13,7 @@ orderedmultidict==1.0.1
 packaging==21.0
 pathspec==0.9.0
 platformdirs==2.3.0
-protobuf==3.18.3
+protobuf==4.25.8
 psycopg2==2.9.1
 pydantic==1.10.13
 pyparsing==2.4.7