Does this work?

.github/workflows/publish-docs.yml

@@ -12,19 +12,12 @@ jobs:
   push-documentation:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2
-
       - name: Install Doxygen Portable
         run: |
           sudo apt-get update
           sudo apt-get install doxygen
           sudo apt-get install graphviz
           doxygen --version
-          
-      - name: Generate documentation
-        run: |
-          doxygen doxygen.config
 
       - name: Set config settings
         run: |
@@ -35,7 +28,7 @@ jobs:
       - name: Clone gh-pages branch
         run: |
           mkdir gh-pages
-          git clone --quiet --branch=gh-pages https://${{ secrets.USERNAME }}:${{ secrets.PAT }}@github.com/baynezy/SiteWarmer.git ./gh-pages
+          git clone --quiet --branch=gh-pages git@github.com:baynezy/SiteWarmer.git ./gh-pages
           cd gh-pages
           git status
 
@@ -45,6 +38,10 @@ jobs:
           find . -type f -not -name '.git*' -delete
           git status
 
+      - name: Generate documentation
+        run: |
+          doxygen doxygen.config
+
       - name: Copy contents of documentation folder into gh-pages folder
         run: |
           cp -r ../documentation/html/* .