ci: fix plist script to work with python 3.12

Author: BeryJu

hack/plist.py

@@ -12,7 +12,7 @@
     exit()
 
 with open(argv[1], "r+") as _plist:
-    data = loads(_plist.read())
+    data = loads(_plist.read().encode())
     data[argv[2]] = argv[3]
     _plist.seek(0)
     _plist.write(dumps(data).decode())