docs: v2.11.0 changelog

Author: kozistr

docs/changelogs/v2.11.0.md

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+## Change Log
+
+### Feature
+
+* Implement PAdam optimizer (#186)
+  * [Closing the Generalization Gap of Adaptive Gradient Methods in Training Deep Neural Networks](https://arxiv.org/abs/1806.06763) 
+
+### Diff
+
+[2.10.1...2.11.0](https://github.com/kozistr/pytorch_optimizer/compare/v2.10.1...v2.11.0)