Bump protobuf from 4.25.3 to 4.25.8 in /sparrow

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.25.3 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@v4.25.3...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]

sparrow/requirements.txt

@@ -17,7 +17,7 @@ torch==2.8.0
 torchvision==0.23.0
 torchaudio==2.8.0
 tritonclient[http]==2.26.0
-protobuf==4.25.3
+protobuf==4.25.8
 soundfile==0.12.1
 audioread==3.0.1
 pooch==1.8.2