chore(github): rename all files from yaml => yml

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: true
+contact_links:
+- name: Community Discussions
+  url: https://github.com/edera-dev/sprout/discussions
+  about: Please ask and answer questions here.
+- name: Security Advisory
+  url: https://github.com/edera-dev/sprout/security/advisories/new
+  about: Please report security vulnerabilities here.