docs: v2.11.2 changelog

Author: kozistr

docs/changelogs/v2.11.2.md

@@ -9,6 +9,16 @@
 
 * Fix Lookahead optimizer (#200, #201, #202)
   * When using PyTorch Lightning which expects your optimiser to be a subclass of `Optimizer`.
+* Fix default `rectify` to `False` in `AdaBelief` optimizer (#203)
+
+### Test
+
+* Add `DynamicLossScaler` test case
+
+### Docs
+
+* Highlight the code blocks
+* Fix pepy badges
 
 ### Contributions