Fix json detection with file-5.41-3.fc36.x86_64

It now says "JSON text data", not just "JSON data".

diffoscope/comparators/json.py

@@ -38,7 +38,7 @@ except ImportError:  # noqa
 
 class JSONFile(File):
     DESCRIPTION = "JSON files"
-    FILE_TYPE_RE = re.compile(r"^JSON data")  # Requires file 5.35+
+    FILE_TYPE_RE = re.compile(r"^JSON (?:text )?data")  # Requires file 5.35+
 
     @classmethod
     def recognizes(cls, file):