Language release notes

Author: edgarfgp

docs/release-notes/.Language/preview.md

@@ -7,6 +7,7 @@
 * Allow `_` in `use!` bindings values (lift FS1228 restriction) ([PR #18487](https://github.com/dotnet/fsharp/pull/18487))
 * Warn when `unit` is passed to an `obj`-typed argument  ([PR #18330](https://github.com/dotnet/fsharp/pull/18330))
 * Scoped Nowarn: added the #warnon compiler directive ([Language suggestion #278](https://github.com/fsharp/fslang-suggestions/issues/278), [RFC FS-1146 PR](https://github.com/fsharp/fslang-design/pull/782), [PR #18049](https://github.com/dotnet/fsharp/pull/18049))
+* Allow `let!` and `use!` binding with type annotation without parentheses. ([PR #18508](https://github.com/dotnet/fsharp/pull/18508))
 
 ### Fixed