(GitHub) Add link to discussions from New Issue screen

Author: danburzo

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+    - name: Start a discussion
+      url: https://github.com/danburzo/percollate/discussions/new
+      about: Questions & Answers