Update GitHub Action node versions

Author: timothyhull

.github/workflows/mkdocs.yml

@@ -18,17 +18,17 @@ jobs:
 
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           submodules: recursive
 
       - name: Set up Python3
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: '3.x'
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements*.txt') }}
@@ -43,4 +43,4 @@ jobs:
       - name: Deploy
         run: |
           git pull
-          mkdocs gh-deploy
+          mkdocs gh-deploy