message: release: clean up changelog
diff: # 10.1.0-next.8 (2020-08-24)
  -
  -<a name="10.1.0-next.8"></a>
  -# 10.1.0-next.8 (2020-08-24)
  -
  -
  ### Bug Fixes
  * **localize:** extract the correct message ids ([#38498](https://github.com/angular/angular/issues/38498)) ([ac461e1](https://github.com/angular/angular/commit/ac461e1))
  