Bump actions/upload-artifact from 6 to 7 (#3294)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Hare Sudhan <code@0x6c.dev>

.github/workflows/validate-atomics.yml

@@ -69,7 +69,7 @@ jobs:
         env:
           PYTHONPATH: ${{ github.workspace }}
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: labels.json
           path: atomic_red_team/pr/