Fix Codespell complaints

Author: khoih-prog

.github/stale.yml

@@ -24,7 +24,7 @@ markComment: >
   for your contributions.
 
 unmarkComment: >
-  [STALE_CLR] This issue has been removed from the stale queue. Please ensure activity to keep it openin the future.
+  [STALE_CLR] This issue has been removed from the stale queue. Please ensure activity to keep it opening the future.
 
 closeComment: >
   [STALE_DEL] This stale issue has been automatically closed. Thank you for your contributions.