Merged PR 19580: Update change log for v7.0.9 release

Update change log for v7.0.9 release

.spelling

@@ -952,4 +952,9 @@ createdump
 vPack
 NoLanguage
 PkgES
+buildinfo
+SKUs
+CGManifest
+vmImage
+ci.psm1
 centos-7

CHANGELOG/7.0.md

@@ -1,5 +1,45 @@
 # 7.0 Changelog
 
+## [7.0.9] - 2022-03-16
+
+### Build and Packaging Improvements
+
+<details>
+
+<summary>
+
+<p>Update .NET SDK to 3.1.417</p>
+
+</summary>
+
+<ul>
+<li>Fix the NuGet SDK package creation (Internal 19569)</li>
+<li>Fix NuGet package compliance issues (#13045)</li>
+<li>Fix issues in release build (#16332)</li>
+<li>Enable ARM64 packaging for macOS (#15768)</li>
+<li>Update feed and analyzer dependency (#16327)</li>
+<li>Only upload stable <code>buildinfo</code> for stable releases (#16251)</li>
+<li>Opt-in to build security monitoring (#16911)</li>
+<li>Update experimental feature json files (#16838) (Thanks @!)</li>
+<li>Ensure alpine and arm SKUs have the PowerShell configuration file with experimental features enabled (#16823)</li>
+<li>Remove WiX install (#16834)</li>
+<li>Add Linux package dependencies for packaging (#16807)</li>
+<li>Switch to our custom images for build and release (#16801)</li>
+<li>Remove all references to <code>cmake</code> for the builds in this repo (#16578)</li>
+<li>Register NuGet source when generating <code>CGManifest</code> (#16570)</li>
+<li>Update Images used for release (#16580)</li>
+<li>Add Software Bill of Materials to the main packages (#16202, #16641, #16711)</li>
+<li>Add GitHub Workflow to keep notices up to date (#16284)</li>
+<li>Update the <code>vmImage</code> and PowerShell root directory for macOS builds (#16611)</li>
+<li>Update macOS build image and root folder for build (#16609)</li>
+<li>Add checkout to build json stage to get <code>ci.psm1</code> (#16399)</li>
+<li>Move mapping file into product repo and add Debian 11  (#16316)</li>
+</ul>
+
+</details>
+
+[7.0.9]: https://github.com/PowerShell/PowerShell/compare/v7.0.8...v7.0.9
+
 ## [7.0.8] - 2021-10-14
 
 ### Engine Updates and Fixes