📝 Update release notes

docs/en/docs/release-notes.md

@@ -2,6 +2,7 @@
 
 ## Latest Changes
 
+* 📝 Upgrade HTTPS guide with more explanations and diagrams. PR [#3950](https://github.com/tiangolo/fastapi/pull/3950) by [@tiangolo](https://github.com/tiangolo).
 * 🌐 Add German translation for `docs/features.md`. PR [#3699](https://github.com/tiangolo/fastapi/pull/3699) by [@mawassk](https://github.com/mawassk).
 * 🎨 Tweak CSS styles for shell animations. PR [#3888](https://github.com/tiangolo/fastapi/pull/3888) by [@tiangolo](https://github.com/tiangolo).
 * 🔧 Add new Sponsor Calmcode.io. PR [#3777](https://github.com/tiangolo/fastapi/pull/3777) by [@tiangolo](https://github.com/tiangolo).