Remove documentation link from issue template config

- Force users to use the bug report template by removing alternative options
- Only blank_issues_enabled: false remains to prevent blank issues

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1 @@
-blank_issues_enabled: false
-contact_links:
-  - name: Documentation
-    url: https://github.com/WildKernels/GKI_KernelSU_SUSFS/blob/main/README.md
-    about: ""
+blank_issues_enabled: false