Bump Google.Protobuf from 3.24.4 to 3.25.3

Bumps [Google.Protobuf](https://github.com/protocolbuffers/protobuf) from 3.24.4 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@v3.24.4...v3.25.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

src/ProtobufDecoder/ProtobufDecoder.csproj

@@ -5,6 +5,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.24.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.25.3" />
   </ItemGroup>
 </Project>

test/ProtobufDecoder.Test.Unit/ProtobufDecoder.Test.Unit.csproj

@@ -20,7 +20,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.24.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.25.3" />
   </ItemGroup>
 
   <ItemGroup>