Fix docdeploy

Author: ufechner7

.github/workflows/CI.yml

@@ -70,6 +70,14 @@ jobs:
       - uses: julia-actions/setup-julia@v2
       - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
+      - name: Set up git credentials
+        run: git remote set-url upstream https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/OpenSourceAWE/AtmosphericModels.jl.git
+
+      - name: Push to GitHub Pages
+        run: git push upstream HEAD:gh-pages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - uses: julia-actions/julia-docdeploy@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}