[utils] Fix file permissions in write_json_file (closes #12471) (#25122)

youtube_dl/utils.py

@@ -1837,6 +1837,12 @@ def write_json_file(obj, fn):
                 os.unlink(fn)
             except OSError:
                 pass
+        try:
+            mask = os.umask(0)
+            os.umask(mask)
+            os.chmod(tf.name, 0o666 & ~mask)
+        except OSError:
+            pass
         os.rename(tf.name, fn)
     except Exception:
         try: