fix typo in template config.yml

Author: 2bndy5

.github/ISSUE_TEMPLATE/config.yml

@@ -2,7 +2,7 @@
 blank_issues_enabled: false
 # if the templates provided don't fit the subject of the user feedback,
 # here we can give links to other forms of user feedback
-contact-links:
+contact_links:
   - name: cpp-linter discussions
     url: https://github.com/orgs/cpp-linter/discussions
     about: A place for feedback not specific to cpp-linter-action