Add Link to forums to GitHub issue templates

https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository#configuring-the-template-chooser

Signed-off-by: Tom Wieczorek <[email protected]>

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Questions & Discussion
+    url: https://forums.k8slens.dev/c/k0s
+    about: Ask questions, engage in technical discussions, contribute expertise and feedback!