fix indentation

h2/src/installer/pom.xml

 <project>
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.h2database</groupId>
-        <artifactId>h2</artifactId>
-        <version>@version@</version>
-        <packaging>jar</packaging>
-        <name>H2 Database Engine</name>
-        <url>http://www.h2database.com</url>
-        <description>H2 Database Engine</description>
+    <artifactId>h2</artifactId>
+    <version>@version@</version>
+    <packaging>jar</packaging>
+    <name>H2 Database Engine</name>
+    <url>http://www.h2database.com</url>
+    <description>H2 Database Engine</description>
     <licenses>
         <license>
             <name>The H2 License, Version 1.0</name>