Set concurrency to 1

Author: IoannisPanagiotas

proc/community/src/test/java/org/neo4j/gds/louvain/LouvainWriteProcTest.java

@@ -277,6 +277,7 @@ void testWriteWithMinCommunitySize(Map<String, Object> parameters, long expected
             .algo("louvain")
             .writeMode()
             .addParameter("writeProperty", "writeProperty")
+            .addParameter("concurrency", 1)
             .addAllParameters(parameters)
             .yields("communityCount");