Merge branch 'changelog-7.5.1' into 'master'

Back-port changelog from 7-5-stable

See merge request gitlab-org/gitlab-workhorse!349

CHANGELOG

@@ -9,6 +9,10 @@ v 7.6.0
 - Remove curl from sendfile_test.go !344
 - Update README.md usage example !342
 
+v 7.5.1
+
+- Rename correlation-id structured logging field to correlation_id !343
+
 v 7.5.0
 
 - Add proxy layer to calculate content type and disposition headers !335