adding "Update gitlab-shell" info in doc 7.3-to-7.4.md
I just saw that this section was missing from the doc, and got it from the 6.x-or-7.x-to-7.4.md
.
And I followed the order that it used to appear in others docs like 7.2-to-7.3.md
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
I just saw that this section was missing from the doc, and got it from the 6.x-or-7.x-to-7.4.md
.
And I followed the order that it used to appear in others docs like 7.2-to-7.3.md