fix: spotbug version

Author: mebigfatguy

build.xml

@@ -32,7 +32,7 @@
 	<property name="test_reports.dir" value="${target.dir}/reports/test"/>
 
 	<property name="fb-contrib.version" value="7.6.0" />
-	<property name="sb-contrib.version" value="7.4.8-SNAPSHOT" />
+	<property name="sb-contrib.version" value="7.6.0" />
 
 	<property name="sonatype.dir" value="${user.home}/.sb-contrib-${sb-contrib.version}-sonatype" />