Missing slash in pom.xml for security extensions

[andreasbaumann]

swagger2markup-maven-project-template/pom.xml

Line 71 in e24c865

<swagger2markup.extensions.dynamicSecurity.contentPath>${project.basedir}src/docs/asciidoc/extensions/security</swagger2markup.extensions.dynamicSecurity.contentPath>

should be:

 <swagger2markup.extensions.dynamicSecurity.contentPath>${project.basedir}/src/docs/asciidoc/extensions/security</swagger2markup.extensions.dynamicSecurity.contentPath>