Update global data path (#763)

## Summary

The global data path is out of date. Update it.

## How was it tested?

Signed-off-by: Zhizhen He <[email protected]>

Author: hezhizhen

docs/app/docs/devbox_global.md

@@ -96,7 +96,7 @@ devbox global shellenv | source
 
 ## Sharing Your Global Config
 
-Your global `devbox.json` will be stored in $XDG_DATA_HOME/devbox/global/devbox.json. If $XDG_DATA_HOME is not set, it will default to `~/.local/share/devbox/global/devbox.json`. 
+Your global `devbox.json` will be stored in `$XDG_DATA_HOME/devbox/global/default/devbox.json`. If `$XDG_DATA_HOME` is not set, it will default to `~/.local/share/devbox/global/default/devbox.json`. 
 
 If you want to share your configuration with across machines or with other users, you can copy this file to a git repository or host it online.  You can then download and set the config as your global profile using `devbox global pull <path> | <url>`.
 
@@ -127,4 +127,4 @@ devbox global pull https://raw.githubusercontent.com/org/repo/branch/path/to/dev
 ### Get Involved
 
 * **[Join our Discord Community](https://discord.gg/jetpack-io):** Chat with the development team and our growing community of Devbox users.
-* **[Visit us on Github](https://github.com/jetpack-io/devbox):** File issues and provide feedback, or even open a PR to contribute to Devbox or our Docs.
+* **[Visit us on Github](https://github.com/jetpack-io/devbox):** File issues and provide feedback, or even open a PR to contribute to Devbox or our Docs.