Bump Polly from 7.2.4 to 8.0.0 in /src

Bumps [Polly](https://github.com/App-vNext/Polly) from 7.2.4 to 8.0.0.
- [Release notes](https://github.com/App-vNext/Polly/releases)
- [Changelog](https://github.com/App-vNext/Polly/blob/main/CHANGELOG.md)
- [Commits](App-vNext/Polly@7.2.4...8.0.0)

---
updated-dependencies:
- dependency-name: Polly
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/azure-cost-cli.csproj

@@ -33,7 +33,7 @@
       <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
       <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.12" />
       <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
-      <PackageReference Include="Polly" Version="7.2.4" />
+      <PackageReference Include="Polly" Version="8.0.0" />
       <PackageReference Include="Polly.Extensions.Http" Version="3.0.0" />
       <PackageReference Include="Spectre.Console" Version="0.47.0" />
       <PackageReference Include="Spectre.Console.Cli" Version="0.47.0" />