Bump microsoft.dotnet-openapi from 8.0.6 to 8.0.8

Bumps [microsoft.dotnet-openapi](https://github.com/dotnet/aspnetcore) from 8.0.6 to 8.0.8.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v8.0.6...v8.0.8)

---
updated-dependencies:
- dependency-name: microsoft.dotnet-openapi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.config/dotnet-tools.json

@@ -10,7 +10,7 @@
       "rollForward": false
     },
     "microsoft.dotnet-openapi": {
-      "version": "8.0.6",
+      "version": "8.0.8",
       "commands": [
         "dotnet-openapi"
       ],