Polish "Add GitHub issue templates"

See gh-42770

Author: snicoll

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: false
 contact_links:
-  - name: Asking for help
+  - name: Community Support
     url: https://stackoverflow.com/tags/spring-boot
-    about: The Spring Boot team is using StackOverflow for general questions.
+    about: Please ask and answer questions on StackOverflow with the tag `spring-boot`.