chore: fix typo in osgi/pom.xml

Author: federicorispo

examples/osgi/pom.xml

@@ -17,7 +17,7 @@
     <graphql.java.servlet.version>11.0.0-SNAPSHOT</graphql.java.servlet.version>
     <graphql.java.version>16.1</graphql.java.version>
     <karaf.version>4.2.10</karaf.version>
-u    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.source>11</maven.compiler.source>
     <maven.compiler.target>11</maven.compiler.target>
   </properties>