use new secret for nightly build

Author: theorashid

.github/workflows/nightly.yml

@@ -27,7 +27,7 @@ jobs:
         uses: pypa/[email protected]
         with:
           user: __token__
-          password: ${{ secrets.nightly_pypi_secret }}
+          password: ${{ secrets.PYPI_TOKEN_PYMC_NIGHTLY }}
   test-install-job:
     needs: build-and-publish-nightly
     runs-on: ubuntu-latest