Update CHANGELOG.md for 10.7.5

[ci skip]

CHANGELOG.md

@@ -193,6 +193,15 @@ entry.
 - Gitaly handles repository forks by default.
+## 10.7.5 (2018-05-28)
+
+### Security (3 changes)
+
+- Prevent user passwords from being changed without providing the previous password.
+- Fix API to remove deploy key from project instead of deleting it entirely.
+- Fixed bug that allowed importing arbitrary project attributes.
+
+
 ## 10.7.4 (2018-05-21)
 ### Fixed (1 change)