[DOCS] Fix attribute typo (#66858)

docs/reference/ilm/ilm-actions.asciidoc

@@ -19,7 +19,7 @@ Freeze the index to minimize its memory footprint.
 
 <<ilm-migrate,Migrate>>::
 Move the index shards to the <<data-tiers, data tier>> that corresponds
-to the current {ilm-init] phase.
+to the current {ilm-init} phase.
 
 <<ilm-readonly,Read only>>::
 Block write operations to the index.