Maven: Update git URLs for releasing

Author: stefan-ka

pom.xml

@@ -32,8 +32,8 @@
 	</modules>
 
 	<scm>
-		<connection>scm:git:https://${env.GITHUB_USERNAME}:${env.GITHUB_PASSWORD}@github.com/ContextMapper/context-mapper-dsl.git</connection>
-		<developerConnection>scm:git:https://${env.GITHUB_USERNAME}:${env.GITHUB_PASSWORD}@github.com/ContextMapper/context-mapper-dsl.git</developerConnection>
+		<connection>scm:git:https://${env.GH_CI_USERNAME}:${env.GH_CI_TOKEN}@github.com/ContextMapper/context-mapper-dsl.git</connection>
+		<developerConnection>scm:git:https://${env.GH_CI_USERNAME}:${env.GH_CI_TOKEN}@github.com/ContextMapper/context-mapper-dsl.git</developerConnection>
 		<tag>HEAD</tag>
 	</scm>