Fix wrong line ending [ci-skip]

doc/development/ux_guide/copy.md

@@ -176,4 +176,4 @@ Portions of this page are modifications based on work created and shared by the
 [products]: https://about.gitlab.com/products/ "GitLab products page"
 [serial comma]: https://en.wikipedia.org/wiki/Serial_comma "“Serial comma” in Wikipedia"
 [android project]: http://source.android.com/
-[creative commons]: http://creativecommons.org/licenses/by/2.5/
\ No newline at end of file
+[creative commons]: http://creativecommons.org/licenses/by/2.5/