Added CI workflow to fail when build.sh changes aren't committed

.github/workflows/Build.yml

@@ -0,0 +1,28 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  Build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build
+        run: |
+          # Rebuild per-JDK actions based on the base content
+          ./build.sh
+
+          # Fail CI if rebuilding left uncommitted changes
+          if [ "$(git status --porcelain | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build.  See status below:"
+            git status
+            exit 1
+          fi