Update BOM - Grails Gradle Plugin

Signed-off-by: Puneet Behl <[email protected]>

Author: puneetbehl

grails-bom/plugins.properties

@@ -1,7 +1,7 @@
 gorm.hibernate5=7.2.2
 gorm.mongodb=7.2.1
 gorm.neo4j=7.2.1
-grails-gradle-plugin=5.1.3
+grails-gradle-plugin=5.1.5
 cache=5.0.0
 rxjava=1.1.1
 rxjava2=2.0.0