Fix changelogs

Author: fabpot

CHANGELOG.md

@@ -7,7 +7,7 @@ CHANGELOG
  * Environment variable `SYMFONY_IDE` is read by default when `framework.ide` config is not set.
  * Load PHP configuration files by default in the `MicroKernelTrait`
  * Add `cache:pool:invalidate-tags` command
- * Add `XliffFileDumper` with `xliff` as the extension as a service
+ * Add `xliff` support in addition to `xlf` for `XliffFileDumper`
 
 6.0
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