update dco token

Author: binaryaaron

.github/workflows/dco-assistant.yml

@@ -35,7 +35,7 @@ jobs:
         uses: contributor-assistant/github-action@ca4a40a7d1004f18d9960b404b97e5f30a505a08
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          PERSONAL_ACCESS_TOKEN: ${{ secrets.DCO_ASSISTANT_TOKEN }}
+          PERSONAL_ACCESS_TOKEN: ${{ secrets.NSS_GHA_TOKEN }}
         with:
           path-to-signatures: "dco-signatures.json"
           path-to-document: "https://github.com/NVIDIA-NeMo/safe-synthesizer/blob/main/DCO"