Bump VoltRpc.Proxy.Generator from 2.2.0 to 2.3.0 in /src

Bumps [VoltRpc.Proxy.Generator](https://github.com/Voltstro-Studios/VoltRpc) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/Voltstro-Studios/VoltRpc/releases)
- [Changelog](https://github.com/Voltstro-Studios/VoltRpc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Voltstro-Studios/VoltRpc/commits)

---
updated-dependencies:
- dependency-name: VoltRpc.Proxy.Generator
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/VoltstroStudios.UnityWebBrowser.Shared/VoltstroStudios.UnityWebBrowser.Shared.csproj

@@ -17,7 +17,7 @@
         <PackageReference Include="VoltRpc" Version="3.1.0" />
         <PackageReference Include="VoltRpc.Extension.Memory" Version="1.1.0" />
         <PackageReference Include="VoltRpc.Extension.Vectors" Version="1.1.0" />
-        <PackageReference Include="VoltRpc.Proxy.Generator" Version="2.2.0" />
+        <PackageReference Include="VoltRpc.Proxy.Generator" Version="2.3.0" />
     </ItemGroup>
 
     <!-- Create debug symbols since this will be shared with Unity as well -->