fix(pom): normalize formatting with xmllint (4-space indent)

Author: loong10k

pom.xml

@@ -53,7 +53,6 @@
         <maven-jacoco-plugin.version>0.8.15</maven-jacoco-plugin.version>
         <maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>
         <maven-source-plugin.version>3.4.0</maven-source-plugin.version>
-    
     </properties>
     <dependencyManagement>
         <dependencies>