Apply suggestions from code review

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

Co-authored-by: Márk Sági-Kazár <sagikazarmark@users.noreply.github.com>
Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

.github/ISSUE_TEMPLATE/config.yml

@@ -11,3 +11,7 @@ contact_links:
   - name: 💬 Slack channel
     url: https://cloud-native.slack.com/messages/dexidp
     about: Please ask and answer questions here
+
+  - name: 💡 Dex Enhancement Proposal
+    url: https://github.com/dexidp/dex/tree/master/enhancements/README.md
+    about: Open a proposal for significant architectural change