add #3211 to create-issue links

Author: abonander

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: Enabling some optional features adds unexpected crates to Cargo.lock
+    url: https://github.com/launchbadge/sqlx/issues/3211
+    about: See this issue.
   - name: I have a question or problem
     url: https://github.com/launchbadge/sqlx/tree/main/FAQ.md
     about: See our FAQ.