Asset library link on official docs is broken

**Your Redot version:**
N/A

**Issue description:**
The link located on [asset library docs](https://docs.redotengine.org/en/stable/community/asset_library/what_is_assetlib) references to https://www.redotengine.org/asset-library/asset which is not located on the official website

**URL to the documentation page:**
https://docs.redotengine.org/en/stable/community/asset_library/what_is_assetlib

