chore: update test with latest Svelte5 (#672)

Author: baseballyama

tests/fixtures/parser/style-context/parse-error-output.json

@@ -3,7 +3,7 @@
   "sourceLang": "css",
   "error": {
     "name": "CssSyntaxError",
-    "reason": "Unknown word",
+    "reason": "Unknown word .div-class/35",
     "source": "\n  // This syntax is intentionally invalid CSS - this is to be used to test resiliency against invalid input\n  .container {\n    class .div-class/35\n      # Weird comment\n      color: red;\n\n    .span-class begin\n      font-weight: bold;\n    end\n  }\n",
     "line": 4,
     "column": 11,