Pinned github actions

.github/workflows/aux.library.pypi.yml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@7f80679172b057fc5e90d70d197929d454754a5a
         with:
           python-version: '3.x'
 
@@ -30,7 +30,7 @@ jobs:
         run: python -m build
 
       - name: Publish to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@717ba43cfbb0387f6ce311b169a825772f54d295
         with:
           user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}