DOCSP-25519 helper link (#1933)

Dave Cuthbert · web-flow · commit a63e6ac7b91d · 2022-10-03T10:15:53.000-04:00
diff --git a/source/core/index-unique.txt b/source/core/index-unique.txt
@@ -239,6 +239,7 @@ of documents that do not meet the unique constraint if the documents do
 not meet the filter criteria. For an example, see
 :ref:`partial-index-with-unique-constraints`.
 
+.. _sharded-clusters-unique-indexes:
 
 Sharded Clusters and Unique Indexes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
