process: typo corrected

Ref: closes #316

Author: PandaeDo

docs/platform_management_plan/change_management.rst

@@ -217,7 +217,7 @@ ISSUE status ``OPEN`` and PR status ``OPEN``.
 if the Change Request is accepted or rejected.
 
 :need:`Committer <PROCESS_rl__committer>` checks finally if the Change Request is completed and the
-required verification measures are executed and sucessfully passed.
+required verification measures are executed and successfully passed.
 
 If ``approved``, the status of the concerned PRs change to ``MERGED``,
 otherwise, if rejected, PR status changes to ``CLOSED``.