Revert "Apply suggestion to doc/user/markdown.md"

This reverts commit 20182a28bbeeb72f3f9a71374860987b8d714506

doc/user/markdown.md

@@ -1433,7 +1433,9 @@ Example:
 Additionally, you can choose the alignment of text within columns by adding colons (`:`)
 to the sides of the "dash" lines in the second row. This will affect every cell in the column.
 
-> Note that the headers are always right aligned [within GitLab itself](https://gitlab.com/gitlab-org/gitlab/blob/master/doc/user/markdown.md#tables).
+NOTE: **Note:**
+[Within GitLab itself](https://gitlab.com/gitlab-org/gitlab/blob/master/doc/user/markdown.md#tables),
+the headers are always left-aligned in Chrome and Firefox, and centered in Safari.
 
 ```markdown
 | Left Aligned | Centered | Right Aligned | Left Aligned | Centered | Right Aligned |