[ci] Update readme for security manager

README.md

@@ -85,7 +85,7 @@ This plugin is written entirey in groovy.  It does have limitations when it come
 
 Known issues
 
-The security manager is turned off by default in jdk 18/19 and scheduled from removal in a future java release, therefore to use this plugin with jdk 18/19, the security manager may need turned back on using ```JAVA_OPTS``` to ```-Djava.security.manager=allow```.  See [groovy](https://groovy-lang.org/releasenotes/groovy-4.0.html) for more details.
+The security manager is turned off by default in jdk 18 and scheduled from removal in a future java release, therefore to use this plugin with jdk 18+, the security manager may need turned back on using ```JAVA_OPTS``` to ```-Djava.security.manager=allow```.  See [groovy](https://groovy-lang.org/releasenotes/groovy-4.0.html) for more details.
 
 If using groovy with same group id (```org.codehaus.groovy 3.x``` or before or ```org.apache.groovy 4.x or above```), an error may occur if not on same version. To alleviate that, make sure groovy artifacts are defined in ```dependency management``` in order to force the loaded version correctly on your usage.