Add issue contact links

Author: jumpingpxl

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Need Help?
+    url: https://labymod.net/dc/dev
+    about: Join our Discord server to ask for help regarding the LabyMod 4 Server API.
+  - name: LabyMod Developer Portal
+    url: https://wiki.labymod.net/
+    about: Check out our Developer Portal to understand the LabyMod 4 Server API better.