Bump Polly in /query-tool/tests/Piipan.QueryTool.Tests

Bumps [Polly](https://github.com/App-vNext/Polly) from 7.2.3 to 8.4.0.
- [Release notes](https://github.com/App-vNext/Polly/releases)
- [Changelog](https://github.com/App-vNext/Polly/blob/main/CHANGELOG.md)
- [Commits](https://github.com/App-vNext/Polly/commits/8.4.0)

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

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

shared/src/Piipan.Shared.Client/Piipan.Shared.Client/Piipan.Shared.Client.csproj

@@ -23,7 +23,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="6.0.13" />
-    <PackageReference Include="Polly" Version="7.2.3" />
+    <PackageReference Include="Polly" Version="8.4.0" />
   </ItemGroup>
 
   <ItemGroup>