Fix test

Author: Björn Ekryd

maven-plugin/src/it/four-spaces-indent/expected_pom.xml

@@ -22,7 +22,7 @@
             <plugin>
                 <groupId>com.github.ekryd.sortpom</groupId>
                 <artifactId>sortpom-maven-plugin</artifactId>
-                <version>2.15.1-SNAPSHOT</version>
+                <version>@pom.version@</version>
                 <executions>
                     <execution>
                         <goals>