0.8.2 release notes (#3371)

docs/whats_new/v0.8.2.md

@@ -0,0 +1,16 @@
+# Version 0.8.2
+
+v0.8.2 is a hot-fix release to pin `pydantic` version to avoid crashing during HPO
+
+As always, only load previously trained models using the same version of AutoGluon that they were originally trained on. 
+Loading models trained in different versions of AutoGluon is not supported.
+
+See the full commit change-log here: https://github.com/autogluon/autogluon/compare/0.8.1...0.8.2
+
+This version supports Python versions 3.8, 3.9, and 3.10.
+
+# Changes
+
+* codespell: action, config + some typos fixed @yarikoptic @yinweisu (#3323)
+* Unpin sentencepiece @zhiqiangdon (#3368)
+* Pin pydantic @yinweisu (3370)