ci(dev_script): fix patches vm.args path

Fixes the path to the patches directory so it works with `quickrun`.

Before fix:
```
iex(emqx@127.0.0.1)3> :init.get_arguments()
[
  # ...
  pa: ['"_build/dev-run/emqx/data/patches"'],
  # ...
]
```

After fix:
```
iex(emqx@127.0.0.1)1> :init.get_arguments()
[
  # ...
  pa: ['_build/dev-run/emqx/data/patches'],
  # ...
]
```

dev

@@ -290,7 +290,7 @@ append_args_file() {
 +IOt 4
 +SDio 8
 -shutdown_time 30000
--pa '"$EMQX_DATA_DIR/patches"'
+-pa '$EMQX_DATA_DIR/patches'
 -mnesia dump_log_write_threshold 5000
 -mnesia dump_log_time_threshold 60000
 -os_mon start_disksup false