replace tab with spaces

Author: Eddykasp

build/pom.xml

@@ -146,7 +146,7 @@
         <groupId>org.eclipse.dash</groupId>
         <artifactId>license-tool-plugin</artifactId>
         <version>1.1.0</version>
-	<executions>
+        <executions>
           <execution>
           <id>license-check</id>
           <goals>