Merge pull request #17670 from getsentry/prepare-release/10.12.0

meta(changelog): Update changelog for 10.12.0

Author: andreiborza

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 - "You miss 100 percent of the chances you don't take. — Wayne Gretzky" — Michael Scott
 
-# 10.12.0
+## 10.12.0
 
 ### Important Changes