Add updates for x86_64 crate

Author: phil-opp

content/this-month/2022-02/index.md

@@ -37,7 +37,18 @@ In this section, we give an overview of notable changes to the projects hosted u
 
 The `x86_64` crate provides various abstractions for `x86_64` systems, including wrappers for CPU instructions, access to processor-specific registers, and abstraction types for architecture-specific structures such as page tables and descriptor tables.
 
-In February, …
+In February, we merged the following pull requests:
+
+- [Remove external assembly](https://github.com/rust-osdev/x86_64/pull/343)
+- [Implement core::iter::Step for VirtAddr and Page](https://github.com/rust-osdev/x86_64/pull/342)
+- [Make fields of `VirtAddrNotValid` and `PhysAddrNotValid` public](https://github.com/rust-osdev/x86_64/pull/340)
+- [Fix: `VirtAddrNotValid` and `PhysAddrNotValid` should contain the whole address](https://github.com/rust-osdev/x86_64/pull/347)
+
+We also merged a few breaking changes, which will be part of the upcoming `v0.15` release:
+
+- [Merge latest changes from master into next and migrate code](https://github.com/rust-osdev/x86_64/pull/338)
+- [Make `Cr2::read` return a result](https://github.com/rust-osdev/x86_64/pull/335)
+- [Remove external_asm and inline_asm features](https://github.com/rust-osdev/x86_64/pull/345)
 
 ### [`uefi-rs`](https://github.com/rust-osdev/uefi-rs)