fix: use correct _extends syntax to reference org .github repo in release-drafter config (#183)

* Initial plan

* fix: replace _extends with inline release-drafter config

Co-authored-by: shenxianpeng <3353385+shenxianpeng@users.noreply.github.com>

* fix: use correct v7 _extends syntax to reference org .github repo

Co-authored-by: shenxianpeng <3353385+shenxianpeng@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: shenxianpeng <3353385+shenxianpeng@users.noreply.github.com>

Author: Copilot

.github/release-drafter.yml

@@ -1,2 +1,2 @@
 # Configuration for Release Drafter: https://github.com/release-drafter/release-drafter
-_extends: .github
+_extends: .github:release-drafter.yml