uefi: update CHANGELOG

Author: phip1611

uefi/CHANGELOG.md

@@ -3,6 +3,10 @@
 See [Deprecating SystemTable/BootServices/RuntimeServices][funcmigrate] for
 details of the new `system`/`boot`/`runtime` modules, and upcoming deprecations.
 
+Further, we added documentation to `lib.rs` and the [uefi-rs book] about how
+`uefi` compares to standard Rust binaries for UEFI (those using `std`), and how
+to integrate the `uefi` crate into them.
+
 ## Added
 - `uefi::system` is a new module that provides freestanding functions for
   accessing fields of the global system table.
@@ -595,3 +599,6 @@ Rust 1.68 or higher.
   truncated and could result in out-of-bounds reads.
 - Fixed size check for file info types so that alignment padding is
   taken into account. This fixes potential out-of-bounds writes.
+
+
+[uefi-rs book]: https://rust-osdev.github.io/uefi-rs/HEAD