fix: set correct property for nonProxyHosts

While there are different system properties for http and https proxies, there is only one shared property for proxy exclusions: http.nonProxyHosts

Setting https.nonProxyHosts has no effect on any recent JDK

Fixes jeremylong#6283

maven/src/main/java/org/owasp/dependencycheck/maven/BaseDependencyCheckMojo.java

@@ -2194,7 +2194,7 @@ protected void populateSettings() {
  System.setProperty("https.proxyPassword", mavenProxy.getPassword());
  }
  if (mavenProxy.getNonProxyHosts() != null && !mavenProxy.getNonProxyHosts().isEmpty()) {
- System.setProperty("https.nonProxyHosts", mavenProxy.getNonProxyHosts());
+ System.setProperty("http.nonProxyHosts", mavenProxy.getNonProxyHosts());
  }
  }