ci: split this out into a postrelease job instead

.github/workflows/release.yml

@@ -49,11 +49,19 @@ jobs:
           github_token: ${{ secrets.RELEASE_GH_TOKEN }}
           branch: next
 
-      # quick assertion to validate that rdme CLI can be installed and run on ubuntu
+  # quick assertion to validate that rdme CLI can be installed and run on ubuntu
+  postrelease:
+    name: Post-release checks
+    needs: release
+    runs-on: ubuntu-latest
+    if: ${{ github.ref }} == 'refs/heads/next'
+    steps:
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
       - name: Install `rdme` from npm
-        if: ${{ github.ref }} == 'refs/heads/next'
         run: npm install -g rdme@next
       - name: Print rdme CLI version
-        if: ${{ github.ref }} == 'refs/heads/next'
         run: rdme --version
         timeout-minutes: 1