Bump oxsecurity/megalinter from 7 to 8

Bumps [oxsecurity/megalinter](https://github.com/oxsecurity/megalinter) from 7 to 8.
- [Release notes](https://github.com/oxsecurity/megalinter/releases)
- [Changelog](https://github.com/oxsecurity/megalinter/blob/main/CHANGELOG.md)
- [Commits](oxsecurity/megalinter@v7...v8)

---
updated-dependencies:
- dependency-name: oxsecurity/megalinter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/mega-linter.yml

@@ -47,7 +47,7 @@ jobs:
         id: ml
         # You can override MegaLinter flavor used to have faster performances
         # More info at https://megalinter.github.io/flavors/
-        uses: oxsecurity/megalinter/flavors/dotnet@v7
+        uses: oxsecurity/megalinter/flavors/dotnet@v8
         env:
           # All available variables are described in documentation
           # https://megalinter.github.io/configuration/