Add workflow to refresh jdk23 from upstream

.github/workflows/refresh-jdk23.yml

@@ -0,0 +1,32 @@
+name: "Refresh jdk23 from Upstream"
+on:
+  schedule:
+    - cron: '0 8 * * *'
+  workflow_dispatch:
+env:
+  UPSTREAM_REMOTE: https://github.com/openjdk/jdk.git
+  LOCAL_BRANCH: jdk23
+jobs:
+    refresh-jdk:
+        runs-on: ubuntu-latest
+        name: "Update Corretto-jdk"
+        if: github.repository_owner == 'corretto'
+        steps:
+            - name: "Checkout code"
+              uses: actions/checkout@v2
+              with:
+                fetch-depth: 0
+                ref: ${{ env.LOCAL_BRANCH }}
+            - name: "Configure the user"
+              run: |
+                git config user.email "[email protected]"
+                git config user.name "corretto-github-robot"
+            - name: "Merge openjdk/jdk:jdk23 to the corretto-jdk:jdk23"
+              run: |
+                git fetch $UPSTREAM_REMOTE jdk23 || exit 1
+                git merge -m "Merge upstream-jdk" FETCH_HEAD
+            - name: "Update Corretto version"
+              shell: bash
+              run: bash ./.github/scripts/update-version.sh $UPSTREAM_REMOTE
+            - name: "Push to the corretto-jdk"
+              run: git push origin $LOCAL_BRANCH