Fix broken syntax

Author: snicoll

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/site/apt/examples/run-system-properties.apt.vm

@@ -42,7 +42,7 @@
   If the value is empty or not defined (i.e. <<<<my-property/>>>>), the system property
   is set with an empty String as the value. Maven trims values specified in the pom so it
   is not possible to specify a System property who needs to start or end with a space via
-  this mechanism: consider using <<<jvmArguments>> instead.
+  this mechanism: consider using <<<jvmArguments>>> instead.
 
   Any String typed Maven variable can be passed as system properties. Any attempt to pass
   any other Maven variable type (e.g. a <<<List>>> or a <<<URL>>> variable) will cause the