Update CHANGELOG.md to include the v0.9.4 release

CHANGELOG.md

@@ -123,6 +123,16 @@ Thanks to the following for their contributions:
 - [framework/command_attr] Remove recursion limit in `command_attr` ([@acdenisSK]) [c:4729f26]
 - [misc] Remove remaining instances of private `_nonexhausive` fields ([@KamranMackey]) [c:ac66a54]
 
+## [0.9.4] - 2021-01-07
+
+Thanks to the following for their contributions:
+
+- [@acdenisSK]
+
+### Fixed
+
+- [misc] Fixate `command_attr` version to 0.3.2 ([@acdenisSK]) [c:b03df91]
+
 ## [0.9.3] - 2020-12-18
 
 Thanks to the following for their contributions:
@@ -3947,7 +3957,8 @@ Initial commit.
 
 <!-- COMPARISONS -->
 
-[0.10.0]: https://github.com/serenity-rs/serenity/compare/v0.9.3...v0.10.0
+[0.10.0]: https://github.com/serenity-rs/serenity/compare/v0.9.4...v0.10.0
+[0.9.4]: https://github.com/serenity-rs/serenity/compare/v0.9.3...v0.9.4
 [0.9.3]: https://github.com/serenity-rs/serenity/compare/v0.9.2...v0.9.3
 [0.9.2]: https://github.com/serenity-rs/serenity/compare/v0.9.1...v0.9.2
 [0.9.1]: https://github.com/serenity-rs/serenity/compare/v0.9.0...v0.9.1
@@ -4251,6 +4262,8 @@ Initial commit.
 [c:4729f26]: https://github.com/serenity-rs/serenity/commit/4729f2603396be768daee56ff12414331893651c
 [c:ac66a54]: https://github.com/serenity-rs/serenity/commit/ac66a54b87a743eb9f85a7f1dd064769792b3c29
 
+[c:b03df91]: https://github.com/serenity-rs/serenity/commit/b03df91f50a554cd9ab3dcb78d74eba46f2601e8
+
 [c:1cc66b3]: https://github.com/serenity/serenity/commit/1cc66b3d4ba70f75823cb59c5db4e4b0ef162ac7
 [c:1047eac]: https://github.com/serenity/serenity/commit/1047eac908eb28c69691292db8e35e089985a09e
 [c:fac94f2]: https://github.com/serenity/serenity/commit/fac94f2559abe1cfdafe0ca998e011ba08a1e84c