Merge topic 'maint_clarify_merge_process'

6161a64a maint: Add further details about merging topics to release branch

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2238
6 jobs for master in 0 seconds
Status Name Job ID Coverage
  External
passed cmake-dash3win7-windows-release-ninja

00:30:19

passed cmake-hythloth-linux-debug-makefiles+sphinx

00:56:20

passed cmake-hythloth-linux-release-lint-iwyu-tidy

00:24:27

passed cmake-moonshade-osx-debug-ninja

00:12:17

passed cmake-moonshade-osx-release-makefiles

00:18:04

passed cmake-terfin-windows-release-vs2017

00:50:33