Update changelog

CHANGELOG.md

@@ -36,9 +36,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `getrandom_backend` configuration flag for selection of opt-in backends [#504]
 - `Error::new_custom` method [#507]
 - `rndr` opt-in backend [#512]
-- `linux_rustix` opt-in backend [#520]
 - Automatic MemorySanitizer support [#521] [#571]
 - `u32` and `u64` functions for generating random values of the respective type [#544]
+- `linux_raw` opt-in backend [#572]
 
 ### Fixed
 - NetBSD fallback code based on `KERN_ARND` [#555]
@@ -52,7 +52,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#504]: https://github.com/rust-random/getrandom/pull/504
 [#507]: https://github.com/rust-random/getrandom/pull/507
 [#512]: https://github.com/rust-random/getrandom/pull/512
-[#520]: https://github.com/rust-random/getrandom/pull/520
 [#521]: https://github.com/rust-random/getrandom/pull/521
 [#522]: https://github.com/rust-random/getrandom/pull/522
 [#532]: https://github.com/rust-random/getrandom/pull/532
@@ -62,6 +61,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#555]: https://github.com/rust-random/getrandom/pull/555
 [#557]: https://github.com/rust-random/getrandom/pull/557
 [#571]: https://github.com/rust-random/getrandom/pull/571
+[#572]: https://github.com/rust-random/getrandom/pull/572
 
 ## [0.2.15] - 2024-05-06
 ### Added