Fix typo in CONTRIBUTING.md (#1956)

Author: tremor021

.github/CONTRIBUTING.md

@@ -80,7 +80,7 @@ git switch -c your-feature-branch
 ```
 
 ### 4. Change paths in build.func install.func and AppName.sh
-To be able to develop from your own branch you need to change `https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main` to `https://raw.githubusercontent.com/[USER]/[REPOSITORY]/refs/head/[BRANCH]`. You need to make this change atleast in misc/build.func misc/install.func and in your ct/AppName.sh. This change is only for testing. Before opening a Pull Request you should change this line change all this back to point to `https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main`.
+To be able to develop from your own branch you need to change `https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main` to `https://raw.githubusercontent.com/[USER]/[REPOSITORY]/refs/heads/[BRANCH]`. You need to make this change atleast in misc/build.func misc/install.func and in your ct/AppName.sh. This change is only for testing. Before opening a Pull Request you should change this line change all this back to point to `https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main`.
 
 ### 4. Commit changes (without build.func and install.func!)
 ```bash