ci/check: install format tool before run style check script

Signed-off-by: chao an <anchao@xiaomi.com>
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index b7f9351..7ba891c 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -44,6 +44,7 @@
       - name: Check Pull Request
         run: |
           echo "::add-matcher::nuttx/.github/nxstyle.json"
+          pip install cmake-format
           cd apps
           commits="${{ github.event.pull_request.base.sha }}..HEAD"
           git log --oneline $commits