Update recommendations dataset URL.

Author: stefano-ottolenghi

modules/ROOT/pages/indexes/semantic-indexes/vector-indexes.adoc

@@ -1,5 +1,5 @@
 :description: Information about creating, querying, and deleting vector indexes with Cypher.
-:test-setup-dump: https://github.com/neo4j-graph-examples/recommendations/raw/main/data/recommendations-embeddings-25.dump
+:test-setup-dump: https://github.com/neo4j-graph-examples/recommendations/raw/refs/heads/main/data/recommendations-embeddings-aligned-5.26.dump
 :l2-norm: image:l2.svg["l2"]-norm
 include::https://raw.githubusercontent.com/neo4j-graphacademy/courses/main/asciidoc/courses/llm-vectors-unstructured/ad.adoc[]
 
@@ -26,7 +26,7 @@ image::vector-index-graph.svg[Graph example connecting movie to person nodes via
 
 The graph contains 28863 nodes and 332522 relationships.
 
-To recreate the graph, download and import this link:https://github.com/neo4j-graph-examples/recommendations/raw/main/data/recommendations-embeddings-50.dump[dump file] to an empty Neo4j database.
+To recreate the graph, download and import this link:https://github.com/neo4j-graph-examples/recommendations/raw/refs/heads/main/data/recommendations-embeddings-aligned-5.26.dump[dump file] to an empty Neo4j database.
 Dump files can be imported for both link:{neo4j-docs-base-uri}/aura/classic/auradb/importing/import-database/[Aura] and link:{neo4j-docs-base-uri}/operations-manual/current/backup-restore/restore-dump/[on-prem] instances.
 
 [NOTE]