*: add change log for 2.0 GA (tikv#1038)

* *: add change log for ga.

CHANGELOG.md

@@ -1,28 +1,38 @@
 # PD Change Log
+
+## v2.0.0-GA
+### New Feature
+* Support using pd-ctl to scatter specified Regions for manually adjusting hotspot Regions in some cases
+### Improvements
+* Improve configuration check rules to prevent unreasonable scheduling configuration
+* Optimize the scheduling strategy when a TiKV node has insufficient space so as to prevent the disk from being fully occupied
+* Optimize hot-region scheduler execution efficiency and add more metrics
+* Optimize Region health check logic to avoid generating redundant schedule operators
+
 ## v2.0.0-rc.5
-### New Features
+### New Feature
 * Support adding the learner node
-### Improves
+### Improvements
 * Optimize the Balance Region Scheduler to reduce scheduling overhead
 * Adjust the default value of `schedule-limit` configuration
 * Fix the compatibility issue when adding a new scheduler
-### Bug Fixes
+### Bug Fix
 * Fix the issue of allocating IDs frequently
 
 ## v2.0.0-rc.4
-### New Features
+### New Feature
 * Support splitting Region manually to handle the hot spot in a single Region
-### Improves
+### Improvement
 * Optimize metrics
-### Bug Fixes
+### Bug Fix
 * Fix the issue that the label property is not displayed when `pdctl` runs `config show all`
 
 ## v2.0.0-rc3
-### New Features
+### New Feature
 * Support Region Merge, to merge empty Regions or small Regions after deleting data
-### Improves
+### Improvements
 * Ignore the nodes that have a lot of pending peers during adding replicas, to improve the speed of restoring replicas or making nodes offline
 * Optimize the scheduling speed of leader balance in scenarios of unbalanced resources within different labels
 * Add more statistics about abnormal Regions
-### Bug Fixes
+### Bug Fix
 * Fix the frequent scheduling issue caused by a large number of empty Regions