fixes #17781: Add migration docs note that .control-label is gone in v4

diff --git a/docs/migration.md b/docs/migration.md
index aa9aa114a14983a12ac374e72a53a5b4b01ca49a..6d8bdc611333939c9e1e837529defeeebfe21c47 100644 (file)
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -70,6 +70,7 @@ New to Bootstrap 4 is the Reboot, a new stylesheet that builds on Normalize with
 ### Forms
 
 - Moved element resets to the `_reboot.scss` file.
+- Renamed `.control-label` to `.form-control-label`.
 - Renamed `.input-lg` and `.input-sm` to `.form-control-lg` and `.form-control-sm`, respectively.
 - Dropped `.form-group-*` classes for simplicity's sake. Use `.form-control-*` classes instead now.
 - Horizontal forms overhauled: