chore: add 12.9.0 changelog (#5146)

* chore: add 12.9.0 changelog

* chore: make changelog links relative

Author: AtofStryker

docs/guides/references/changelog.mdx

@@ -2,6 +2,42 @@
 title: Changelog
 ---
 
+## 12.9.0
+
+_Released 03/28/2023_
+
+**Features:**
+
+- The [Debug page](/guides/cloud/runs#Debug) now allows for navigating between
+  all runs recorded for a commit. Addresses
+  [#25899](https://github.com/cypress-io/cypress/issues/25899) and
+  [#26018](https://github.com/cypress-io/cypress/issues/26018).
+
+**Bugfixes:**
+
+- Fixed a compatibility issue so that component test projects can use
+  [Vite](https://vitejs.dev/) version 4.2.0 and greater. Fixes
+  [#26138](https://github.com/cypress-io/cypress/issues/26138).
+- Fixed an issue where [`cy.intercept()`](/api/commands/intercept) added an
+  additional `content-length` header to spied requests that did not set a
+  `content-length` header on the original request. Fixes
+  [#24407](https://github.com/cypress-io/cypress/issues/24407).
+- Changed the way that Git hashes are loaded so that non-relevant runs are
+  excluded from the Debug page. Fixes
+  [#26058](https://github.com/cypress-io/cypress/issues/26058).
+- Corrected the [`.type()`](/api/commands/type) command to account for shadow
+  root elements when determining whether or not focus needs to be simulated
+  before typing. Fixes
+  [#26198](https://github.com/cypress-io/cypress/issues/26198).
+- Fixed an issue where an incorrect working directory could be used for Git
+  operations on Windows. Fixes
+  [#23317](https://github.com/cypress-io/cypress/issues/23317).
+
+**Misc:**
+
+- Made some minor styling updates to the Debug page. Addresses
+  [#26041](https://github.com/cypress-io/cypress/issues/26041).
+
 ## 12.8.1
 
 _Released 03/15/2023_