Fix CI workflow YAML for Playwright failure summary step

.gitea/workflows/ci.yml

@@ -229,14 +229,13 @@ jobs:
         run: |
           if [ -f test-results/junit.xml ]; then
             echo "=== Failed tests (from junit.xml) ==="
-            python3 - <<'PY'
-import xml.etree.ElementTree as ET
-tree = ET.parse("test-results/junit.xml")
-for suite in tree.getroot().iter("testsuite"):
-    for case in suite.iter("testcase"):
-        if case.find("failure") is not None or case.find("error") is not None:
-            print(case.attrib.get("name", "?"))
-PY
+            node -e "
+              const fs = require('fs');
+              const xml = fs.readFileSync('test-results/junit.xml', 'utf8');
+              for (const m of xml.matchAll(/<testcase[^>]*name=\"([^\"]+)\"[^>]*>[\\s\\S]*?<(?:failure|error)/g)) {
+                console.log(m[1]);
+              }
+            "
           fi
 
       - name: Upload report