ci: Update GitHub actions

.github/workflows/deploy-documentation.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout 🛎️
-        uses: actions/checkout@v2.3.1 # If you're using actions/checkout@v2 you must set persist-credentials to false in most cases for the deployment to work correctly.
+        uses: actions/checkout@v4 # If you're using actions/checkout@v2 you must set persist-credentials to false in most cases for the deployment to work correctly.
         with:
           persist-credentials: false
 
@@ -33,7 +33,7 @@ jobs:
           sphinx-build -b html ./docs-source ./docs
         
       - name: Deploy 🚀
-        uses: JamesIves/github-pages-deploy-action@4.1.3
+        uses: JamesIves/github-pages-deploy-action@v4
         with:
           BRANCH: gh-pages # The branch the action should deploy to.
           FOLDER: ./docs # The folder the action should deploy.