Upgrade Jekyll action and add dependabot. Use a workaround for bug in…

… the action. See helaili/jekyll-action#143 and https://github.com/orgs/community/discussions/55820.

Signed-off-by: James R. Perkins <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,10 @@
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/github-pages.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
-      - uses: helaili/[email protected]
-        env:
-          JEKYLL_PAT: ${{ secrets.JEKYLL_PAT }}
+      - uses: helaili/[email protected]
+        with:
+          pre_build_commands: git config --global http.version HTTP/1.1; apk fetch git-lfs;
+          token: ${{ secrets.JEKYLL_PAT }}
+          target_branch: 'gh-pages'