fix: checktest workflow issue

Author: kobenguyent

.github/workflows/check.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - uses: testomatio/check-tests@master
+    - uses: testomatio/check-tests@stable
       if: github.repository == 'codeceptjs/CodeceptJS' && github.event.pull_request.title == '3.x'
       with:
         framework: mocha