Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

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

.github/workflows/ci.yml

@@ -132,7 +132,7 @@ jobs:
 
       - name: Upload artifacts
         if: ${{ !contains(github.ref, 'pull') && !contains(github.ref, 'epic') && github.actor != 'dependabot[bot]' }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Trakt.NET-CI-Build-${{ needs.environment-check.outputs.target_branch_name }}.${{ github.run_number }}-${{ github.sha }}
           retention-days: 14
@@ -176,7 +176,7 @@ jobs:
         run: cd docs && docfx metadata && docfx build
 
       - name: Upload documentation artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Trakt.NET-Documentation-${{ needs.environment-check.outputs.target_branch_name }}.${{ github.run_number }}-${{ github.sha }}
           retention-days: 14
@@ -234,7 +234,7 @@ jobs:
 
       - name: Upload artifacts
         if: ${{ github.actor != 'dependabot[bot]' }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Trakt.NET-CI-Build-v2.0.0-Alpha.${{ github.run_number }}-${{ github.sha }}
           retention-days: 14