Update CHANGELOG for v2023.2.1

Author: andyleejordan

Diff for: CHANGELOG.md

@@ -1,5 +1,42 @@
 # PowerShell Extension Release History
 
+## v2023.2.1
+### Thursday, February 23, 2023
+
+#### [vscode-powershell](https://github.com/PowerShell/vscode-powershell)
+
+Primarily an update to v3.8 of PowerShell Editor Services, as previewed over February.
+Includes a massive enhancement to extension's symbol support, nearly completing the
+[Consistent References][] project, with the final work in an upcoming preview. Enjoy!
+
+[Consistent References]: https://github.com/PowerShell/vscode-powershell/projects/13
+
+#### [PowerShellEditorServices](https://github.com/PowerShell/PowerShellEditorServices) v3.8.1
+
+- ✨ 📁 [vscode-powershell #2112](https://github.com/PowerShell/PowerShellEditorServices/pull/1995) - Add `WorkspaceFolders` and use it when enumerating files.
+- ✨ 🙏 [vscode-powershell #1481](https://github.com/PowerShell/PowerShellEditorServices/pull/1993) - Count `${Function:My-Function}` as a function reference.
+- 🐛 🙏 [vscode-powershell #1089](https://github.com/PowerShell/PowerShellEditorServices/pull/1990) - Strip scope from function references.
+- 🐛 🙏 [PowerShellEditorServices #1989](https://github.com/PowerShell/PowerShellEditorServices/pull/1989) - Keep only first assignment as declaration.
+- ✨ 🐢 [PowerShellEditorServices #1988](https://github.com/PowerShell/PowerShellEditorServices/pull/1988) - Support Run/Debug tests in PSKoans-files. (Thanks @fflaten!)
+
+In the PR below we rewrote all the symbol logic. Classes (and their properties and
+methods) are now proper symbols. Instead of a dozen similar-yet-different Abstract Symbol
+Tree (AST) PowerShell script visitors handling different parts of each symbol-related
+request, we have a single visitor that builds a cached dictionary of symbols for each
+file. This was a massive simplification of the code that also leads to huge performance
+improvements across all the symbol related features:
+
+- [Go to Symbol in Workspace](https://code.visualstudio.com/Docs/editor/editingevolved#_open-symbol-by-name)
+- [Go to Symbol in Editor](https://code.visualstudio.com/Docs/editor/editingevolved#_go-to-symbol)
+- [Go to Definition](https://code.visualstudio.com/Docs/editor/editingevolved#_go-to-definition)
+- [Go to References / CodeLens](https://code.visualstudio.com/Docs/editor/editingevolved#_reference-information)
+- [Outline view](https://code.visualstudio.com/docs/getstarted/userinterface#_outline-view)
+
+Please try it out and give us feedback! There's plenty of room for more improvement, and
+this will be much easier going forward.
+
+- ✨ 🙏 [PowerShellEditorServices #1984](https://github.com/PowerShell/PowerShellEditorServices/pull/1984) - Integrating class symbol support.
+
 ## v2023.2.1-preview
 ### Monday, February 13, 2023