[Keyboard] Update catalog link in the TheVanKeyboards/Minivan Readme. (#6236)

Previous link was broken.

keyboards/thevankeyboards/minivan/readme.md

@@ -4,7 +4,7 @@ A compact 44% keyboard.
 
 Keyboard Maintainer: QMK Community  
 Hardware Supported: Minivan PCB  
-Hardware Availability: https://thevankeyboards.com/collections/catalog/products/minivan-diy?variant=609138376718
+Hardware Availability: https://thevankeyboards.com/collections/catalog
 
 Make example for this keyboard (after setting up your build environment):