Update managed.md - spelling

docs/extensions/managed.md

@@ -27,10 +27,10 @@ The recommended way to package and distribute managed records is using the [`civ
 
 - **always:** Forcibly overwrite record with values from the `.mgd.php` definition with every cache-flush.
 - **never:** Once installed, the record will never be updated.
-- **unmodified:** Updates to the `.mgd.php` will be propigated only if the record has not been updated by the user.
+- **unmodified:** Updates to the `.mgd.php` will be propagated only if the record has not been updated by the user.
 
 In general, `always` is a good choice for records which are not meant to be updated by the user, such as reserved `OptionValues`.
-In most other cases, `unmodified` is the best trade-off between allowing edits to be made by the user, and propidating updates
+In most other cases, `unmodified` is the best trade-off between allowing edits to be made by the user, and propagating updates
 when changes are made to the `.mgd.php` in new versions of the extension. Changes made by the user can be undone
 by the [`revert`](../api/v4/actions.md#write-actions) API action.