Enable users to manually trigger a deployment from target branch

When testing on a fork I want to be able to push to a non-main branch
and deploy that, rather than force-pushing to main, which is a bad habit
to get into.

Signed-off-by: Robert Young <[email protected]>

Author: robobario

.github/workflows/jekyll-gh-pages.yml

@@ -8,6 +8,12 @@ on:
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
+    inputs:
+      branch:
+        description: 'The branch to checkout'
+        required: true
+        default: 'main'
+        type: string
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
@@ -33,9 +39,11 @@ jobs:
           - 5000:5000
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.branch || github.ref_name }}
       - name: Setup Pages
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3