Bump Google.Protobuf from 3.23.3 to 3.25.3

Bumps [Google.Protobuf](https://github.com/protocolbuffers/protobuf) from 3.23.3 to 3.25.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.23.3...v3.25.3)

---
updated-dependencies:
- dependency-name: Google.Protobuf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Diff for: Sharpcaster/Sharpcaster.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.23.3" />
+    <PackageReference Include="Google.Protobuf" Version="3.25.3" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.1" />