Add a link to discussions

Author: vmihailenco

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
-blank_issues_enabled: false
+blank_issues_enabled: true
 contact_links:
+  - name: Discussions
+    url: https://github.com/go-redis/redis/discussions
+    about: Ask a question via GitHub Discussions
   - name: Discord
     url: https://discord.gg/rWtp5Aj
-    about: Ask a question at Discord
+    about: Ask a question via Discord