chore(deps): bump protobuf in /data/mwaa/requirements (#329)

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.25.4 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@v4.25.4...v4.25.8)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

data/mwaa/requirements/constraint-requirements.txt

@@ -537,7 +537,7 @@ prison==0.2.1
 prometheus_client==0.20.0
 prompt_toolkit==3.0.47
 proto-plus==1.24.0
-protobuf==4.25.4
+protobuf==4.25.8
 psutil==6.0.0
 psycopg2-binary==2.9.9
 ptyprocess==0.7.0