build(deps): Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -78,7 +78,7 @@ jobs:
         dotnet pack src/bunit.generators/ -c release --output ${{ env.NUGET_DIRECTORY }} -p:ContinuousIntegrationBuild=true -p:publicrelease=true
 
     # Publish the NuGet package as an artifact, so they can be used in the following jobs
-    - uses: actions/upload-artifact@v6
+    - uses: actions/upload-artifact@v7
       with:
         name: ${{ env.NUGET_PACKAGES_ARTIFACT }}
         if-no-files-found: error
@@ -141,7 +141,7 @@ jobs:
 
       - name: 📛 Upload hang- and crash-dumps on test failure
         if: success() || failure()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           if-no-files-found: ignore
           name: test-dumps