build(deps): bump Google.Cloud.Storage.V1 in /examples/dotnet (#1518)

Bumps [Google.Cloud.Storage.V1](https://github.com/googleapis/google-cloud-dotnet) from 4.8.0 to 4.9.0.
- [Release notes](https://github.com/googleapis/google-cloud-dotnet/releases)
- [Commits](googleapis/google-cloud-dotnet@Google.Cloud.Storage.V1-4.8.0...Google.Cloud.Storage.V1-4.9.0)

---
updated-dependencies:
- dependency-name: Google.Cloud.Storage.V1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

examples/dotnet/Example.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Cloud.Storage.V1" Version="4.8.0" />
+    <PackageReference Include="Google.Cloud.Storage.V1" Version="4.9.0" />
   </ItemGroup>
 
 </Project>