Fix optional call link (#1051)

Author: JPryce-Aklundh

modules/ROOT/pages/deprecations-additions-removals-compatibility.adoc

@@ -45,7 +45,7 @@ OPTIONAL CALL db.labels() YIELD label
 RETURN label
 ----
 
-| Introduced `OPTIONAL CALL` for optionally executing a xref:clauses/call.adoc#optiona-call[procedure] or xref:subqueries/call-subquery.adoc#optional-call[subquery] `CALL`.
+| Introduced `OPTIONAL CALL` for optionally executing a xref:clauses/call.adoc#optional-call[procedure] or xref:subqueries/call-subquery.adoc#optional-call[subquery] `CALL`.
 Similar to xref:clauses/optional-match.adoc[`OPTIONAL MATCH`], any empty rows produced by the `OPTIONAL CALL` will return `null` and not affect the remainder of the procedure or subquery evaluation.
 
 a|