Update CONTRIBUTING.md (#1272)

.github/CONTRIBUTING.md

@@ -2,4 +2,4 @@
 
 Everybody is invited and welcome to contribute to Proxmox Helper Scripts. 
 
-- Pull requests are always created against the [**pull-requests**](https://github.com/tteck/Proxmox/tree/pull-requests) branch.
+- Pull requests submitted against [**main**](https://github.com/tteck/Proxmox/tree/main) are meticulously scrutinized, so please do not take it personally if I reject your request. If you follow the patterns that have been established throughout the codebase, you greatly increase the likelihood that your changes will get merged into [**main**](https://github.com/tteck/Proxmox/tree/main) :partying_face:!