pin Playwright to older version

Author: jrief

testapp/requirements.txt

@@ -9,7 +9,7 @@ iniconfig==2.1.0
 packaging==25.0
 Pillow==11.3.0
 phonenumbers==9.0.21
-playwright==1.57.0
+playwright==1.55.0
 pluggy==1.5.0
 pyee==13.0.0
 pytest==8.4.2