Update maintainers

Author: res0nance

pom.xml

@@ -16,6 +16,15 @@
         <java.level>8</java.level>
         <jenkins.version>2.222.4</jenkins.version>
     </properties>
+    
+    <developers>
+		<developer>
+			<id>raihaan</id>
+			<name>Raihaan Shouhell</name>
+			<email>raihaanhimself@gmail.com</email>
+			<timezone>+8</timezone>
+		</developer>
+	</developers>
 
     <scm>
         <connection>scm:git:git://github.com/jenkinsci/validating-string-parameter-plugin.git</connection>