Add note to migration guide

diff --git a/docs/4.0/migration.md b/docs/4.0/migration.md
index be861bac93826e4f3974ec99e09336b5b2107d37..5d5343ca9160d52d1d3773971e5cef1f937397b1 100644 (file)
--- a/docs/4.0/migration.md
+++ b/docs/4.0/migration.md
@@ -105,6 +105,7 @@ New to Bootstrap 4 is the [Reboot]({{ site.baseurl }}/docs/{{ site.docs_version
   - Added new `.form-control-label` class to vertically center labels with `.form-control`s.
 - Added custom forms support (for checkboxes, radios, selects, and file inputs).
 - Renamed `.has-error` to `.has-danger`.
+- Renamed `.form-control-static` to `.form-control-plaintext`.
 
 ### Buttons