Update CHANGELOG for v3.8.2

Author: andyleejordan

CHANGELOG.md

@@ -1,5 +1,14 @@
 # PowerShell Editor Services Release History
 
+## v3.8.2
+### Thursday, March 09, 2023
+
+- 🐛 🙏 [vscode-powershell #4443](https://github.com/PowerShell/PowerShellEditorServices/pull/2006) - Fix declaration detection for variables with type constraints.
+- ✨ 🙏 [vscode-powershell #3604](https://github.com/PowerShell/PowerShellEditorServices/pull/2003) - Add document symbols for `#region`.
+- ✨ 🙏 [PowerShellEditorServices #2000](https://github.com/PowerShell/PowerShellEditorServices/pull/2000) - Code clean-up and fixing end-to-end tests.
+- 🐛 🐢 [PowerShellEditorServices #1998](https://github.com/PowerShell/PowerShellEditorServices/pull/1998) - Support module-qualified calls for Pester keywords. (Thanks @fflaten!)
+- 🐛 🙏 [vscode-powershell #3192](https://github.com/PowerShell/PowerShellEditorServices/pull/1997) - Fix New-EditorFile adding content in current file. (Thanks @fflaten!)
+
 ## v3.8.1
 ### Monday, February 13, 2023