📝 Update release notes

[skip ci]

docs/en/docs/release-notes.md

@@ -7,6 +7,10 @@ hide:
 
 ## Latest Changes
 
+### Fixes
+
+* 🐛 Fix support for form values with empty strings interpreted as missing (`None` if that's the default), for compatibility with HTML forms. PR [#13537](https://github.com/fastapi/fastapi/pull/13537) by [@MarinPostma](https://github.com/MarinPostma).
+
 ## 0.123.1
 
 ### Fixes