Check for valid issue on reopen (#216397)

.github/workflows/on-reopen.yml

@@ -0,0 +1,22 @@
+name: On Reopen
+on:
+  issues:
+    types: [reopened]
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Actions
+        uses: actions/checkout@v4
+        with:
+          repository: "microsoft/vscode-github-triage-actions"
+          ref: stable
+          path: ./actions
+      - name: Install Actions
+        run: npm install --production --prefix ./actions
+
+      - name: Check for Validity
+        uses: ./actions/validity-checker
+        with:
+          token: ${{secrets.VSCODE_ISSUE_TRIAGE_BOT_PAT}}