GitHub Actions Updates

- Add dependabot
- Update upload-artifact

Signed-off-by: Joe Block <[email protected]>

Author: unixorn

Diff for: .github/dependabot.yml

@@ -0,0 +1,9 @@
+---
+# Use `allow` to specify which dependencies to maintain
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

Diff for: .github/workflows/megalinter.yml

@@ -59,7 +59,7 @@ jobs:
       # Upload Mega-Linter artifacts. They will be available on Github action page "Artifacts" section
       - name: Archive production artifacts
         if: ${{ success() }} || ${{ failure() }}
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Mega-Linter reports
           path: |