Update tests.yml (#4209)

.github/workflows/tests.yml

@@ -66,12 +66,12 @@ jobs:
     - name: Check Markdown syntax
       run: npm run --silent markdownlint
 
-    - name: Check Right-to-left CSS
-      run: npm run --silent rtlcss && git diff --exit-code
-
     - name: Check CSS syntax
       run: npm run --silent stylelint
 
+    - name: Check Right-to-left CSS
+      run: npm run --silent rtlcss && git diff --exit-code
+
     # Shell tests
 
     - name: Use shell cache