chore: add link to documentation when opening an issue

This adds a link to the docs when opening an issue. This makes users more
likely to read the documentation and try and fix it themselves before opening
an issue.

Author: Tygo-van-den-Hurk

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: Documentation
+    about: Read Slyde' Documentation
+    url: https://slyde.js.org/
   - name: Ask Questions
     about: Ask questions to the community.
     url: https://github.com/Tygo-van-den-Hurk/Slyde/discussions/new?category=q-a