Update CHANGELOG for v3.7.0

Author: andyleejordan

Diff for: CHANGELOG.md

@@ -1,5 +1,13 @@
 # PowerShell Editor Services Release History
 
+## v3.7.0
+### Tuesday, December 06, 2022
+
+- ✨ 👷 [PowerShellEditorServices #1879](https://github.com/PowerShell/PowerShellEditorServices/pull/1967) - Drop support for end-of-life PowerShell 7.0.
+- ✨ 🛫 [PowerShellEditorServices #1965](https://github.com/PowerShell/PowerShellEditorServices/pull/1965) - Send `GitCommitId` over `GetVersionHandler`.
+- 🐛 🛫 [PowerShellEditorServices #1964](https://github.com/PowerShell/PowerShellEditorServices/pull/1964) - Remove unnecessary `PowerShellProcessArchitecture`.
+- 🐛 🚂 [PowerShellEditorServices #1953](https://github.com/PowerShell/PowerShellEditorServices/pull/1953) - Fix `IsExternalInit` bug, re-enable tests, and update OmniSharp to v0.19.7.
+
 ## v3.6.3
 ### Tuesday, November 29, 2022