Bump protobuf from 4.23.0 to 4.25.8

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.23.0 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@v4.23.0...v4.25.8)

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

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

Author: dependabot[bot]

requirements.txt

@@ -26,7 +26,7 @@ itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.2
 proto-plus==1.22.2
-protobuf==4.23.0
+protobuf==4.25.8
 pyasn1==0.5.0
 pyasn1-modules==0.3.0
 pycparser==2.21