Update changelog and readme (#2836)

* Update changelog and readme

* Apply suggestion from @Copilot

Co-authored-by: Copilot <[email protected]>

* Update sdk/typespec/typespec_client_core/README.md

---------

Co-authored-by: Anton Kolesnyk <[email protected]>
Co-authored-by: Heath Stewart <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 3 people

sdk/typespec/typespec_client_core/CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ### Features Added
 
+- Added `TryFrom<>` for `RequestContent<T>` implementations for a wider variety of types.
+
 ### Breaking Changes
 
 - When a retry policy receives a response whose status code indicates the policy shouldn't retry the request, it now returns that response instead of an error

sdk/typespec/typespec_client_core/README.md

@@ -5,7 +5,8 @@ This is the runtime for [TypeSpec](https://typespec.io)-generated clients.
 ## Features
 
 * `debug`: enables extra information for developers e.g., emitting all fields in `std::fmt::Debug` implementation.
-* `derive`: enable derive macros e.g., `Model` and `SafeDebug`.
+* `decimal`: enables support for `rust_decimal::Decimal` type.
+* `derive`: enable derive macros e.g., `SafeDebug`.
 * `http` (default): enables HTTP support.
 * `json` (default): enables JSON support.
 * `reqwest` (default): enables and sets `reqwest` as the default `HttpClient`. Enables `reqwest`'s `native-tls` feature.