Update README.md

Author: fvarrui

README.md

@@ -35,7 +35,7 @@ Add the following `plugin` tag to your `pom.xml`:
 				<!-- optional -->
 				<bundleJre>true|false</bundleJre>
 				<generateInstaller>true|false</generateInstaller>
-                <administratorRequired>true|false</administratorRequired>
+				<administratorRequired>true|false</administratorRequired>
 				<platform>auto|linux|mac|windows</platform>
 				<additionalResources>
 					<additionalResource>file path</additionalResource>