Add (apparently) required about text to issue links (#1169)

* add (apparently) required about text to issue links

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

* Apply suggestions from code review

Co-authored-by: Peter Bourgon <peterbourgon@users.noreply.github.com>

.github/ISSUE_TEMPLATE/config.yml

@@ -2,12 +2,16 @@ blank_issues_enabled: false
 contact_links:
   - name: Ask a question
     url: https://github.com/go-kit/kit/discussions/new?category=q-a
+    about: Questions and discussions with the Go kit community
 
   - name: Website
     url: https://gokit.io/
+    about: Project overview, examples, frequently asked questions, etc.
 
   - name: Reference
     url: https://pkg.go.dev/github.com/go-kit/kit
+    about: Go kit package documentation
 
   - name: Slack channel
     url: https://gophers.slack.com/messages/go-kit
+    about: Real-time discussions and Q&A