Update changelog for #210 and #211

Author: phil-opp

Changelog.md

@@ -1,5 +1,8 @@
 # Unreleased
 
+- Remove feature flag for `lang_items`, `asm` and `global_asm` ([#210](https://github.com/rust-osdev/bootloader/pull/210))
+- Use `set_reg` method of `CS`, `DS`, `ES` and `SS` segment structs ([#211](https://github.com/rust-osdev/bootloader/pull/211))
+
 # 0.10.10 – 2021-12-23
 
 - Fix `asm` imports on latest nightly ([#209](https://github.com/rust-osdev/bootloader/pull/209))