Document that the shortestPath() and allShortestPath() functions can only have a lower bound of 0 or 1 for its variable length pattern

Author: WilcoNeo

modules/ROOT/pages/patterns/reference.adoc

@@ -1372,6 +1372,7 @@ They are similar to `SHORTEST 1` and `ALL SHORTEST`, but with several difference
 * The path pattern is passed as an argument to the functions.
 * The path pattern is limited to a single relationship pattern.
 * To return results where the first and last node in the path are the same requires a change to the configuration setting link:{neo4j-docs-base-uri}/operations-manual/{page-version}/configuration/configuration-settings/#config_dbms.cypher.forbid_shortestpath_common_nodes[`dbms.cypher.forbid_shortestpath_common_nodes`].
+* The minimum path length, also called the lower bound of the variable length relationship pattern, should be 0 or 1.
 
 Both functions will continue to be available, but they are not xref:appendix/gql-conformance/index.adoc[GQL conformant].