Upgrade to Mongodb 3.6.4

Closes gh-13397

Author: wilkinsona

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -125,7 +125,7 @@
 		<micrometer.version>1.0.4</micrometer.version>
 		<mockito.version>2.15.0</mockito.version>
 		<mongo-driver-reactivestreams.version>1.7.1</mongo-driver-reactivestreams.version>
-		<mongodb.version>3.6.3</mongodb.version>
+		<mongodb.version>3.6.4</mongodb.version>
 		<mssql-jdbc.version>6.2.2.jre8</mssql-jdbc.version>
 		<mysql.version>5.1.46</mysql.version>
 		<narayana.version>5.8.2.Final</narayana.version>