Anchor typo

Author: stefano-ottolenghi

modules/ROOT/pages/planning-and-tuning/operators/operators-detail.adoc

@@ -6005,7 +6005,7 @@ Total database accesses: 4, total allocated memory: 184
 
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-[query-plan-merge-into]]
+[[query-plan-merge-into]]
 === Merge Into
 
 The `MergeInto` operator is similar to the xref:planning-and-tuning/operators/operators-detail.adoc#query-plan-merge[`Merge`] operator, but is used when the start and end node of the pattern is matched outside the `MERGE` pattern.