docs(CHANGELOG.md): add dependency bump from dependabot

dependabot[bot] · github-actions[bot] · commit ac00c2b93a0b · 2025-08-21T21:23:02.000Z
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -9,6 +9,7 @@
 ### Bug fixes:
 
 ### Dependencies:
+- build(deps): `github.com/ulikunitz/xz` from 0.5.12 to 0.5.13 ([#1524](https://github.com/fastly/cli/pull/1524))
 
 ## [v11.5.0](https://github.com/fastly/cli/releases/tag/v11.5.0) (2025-08-20)
 
