Fix JSON escaping in test_config.py conditions field

The conditions field had single backslashes instead of double backslashes,
causing JSON parsing to fail. This restores the correct escaping format
that matches the master branch.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Mat001

tests/acceptance/test_acceptance/test_config.py

@@ -394,7 +394,7 @@
         {
             "id": "16902921321",
             "name": "Audience1",
-            "conditions": "[\"and\", [\"or\", [\"or\", {\"match\": \"exact\", \"name\": \"attr_1\", \"type\": \"custom_attribute\", \"value\": \"hola\"}]]]"
+            "conditions": "[\\"and\\", [\\"or\\", [\\"or\\", {\\"match\\": \\"exact\\", \\"name\\": \\"attr_1\\", \\"type\\": \\"custom_attribute\\", \\"value\\": \\"hola\\"}]]]"
         }
     ],
     "events": [