add v13.4.0 changelog

docs/guides/references/changelog.mdx

@@ -2,6 +2,18 @@
 title: Changelog
 ---
 
+## 13.4.0
+
+_Released 10/30/2023_
+
+**Features:**
+
+- Introduced experimental configuration options for advanced retry logic: adds `experimentalStrategy` and `experimentalOptions` keys to the `retry` configuration key. See [Experimental Flake Detection Features](https://docs.cypress.io/guides/references/experiments/#Experimental-Flake-Detection-Features) for more information. Addressed in [#27930](https://github.com/cypress-io/cypress/pull/27930).
+
+**Bugfixes:**
+
+- Fixed a regression in [`13.3.2`](https://docs.cypress.io/guides/references/changelog/13.3.2) where Cypress would crash with 'Inspected target navigated or closed' or 'Session with given id not found'. Fixes [#28141](https://github.com/cypress-io/cypress/issues/28141) and [#28148](https://github.com/cypress-io/cypress/issues/28148).
+
 ## 13.3.3
 
 _Released 10/24/2023_