Merge branch 'docs-web-ide-ce-fix' into 'master'

Docs: update Web IDE > CE (10.7)

See merge request gitlab-org/gitlab-ce!18433

doc/user/project/web_ide/index.md

 # Web IDE
 
-> Introduced in [GitLab Ultimate][ee] 10.4.
-> Brought to [GitLab CE][ce] in 10.7.
+> [Introduced in](https://gitlab.com/gitlab-org/gitlab-ee/issues/4539) [GitLab Ultimate][ee] 10.4.
+> [Brought to GitLab Core][core](https://gitlab.com/gitlab-org/gitlab-ce/issues/44157) in 10.7.
 
 The Web IDE makes it faster and easier to contribute changes to your projects
 by providing an advanced editor with commit staging.
@@ -30,5 +30,4 @@ list.
 An additional review mode is available when you open a merge request, which
 shows you a preview of the merge request diff if you commit your changes.
 
-[ee]: https://about.gitlab.com/products/
-[ce]: https://about.gitlab.com/products/
+[ee]: https://about.gitlab.com/pricing/