Update publishing user and URL

Jenkinsfile

@@ -14,10 +14,10 @@ pipeline {
         }
         stage('Publish to Maven') {
             steps {
-               withCredentials([usernamePassword(credentialsId: 'alttd-publish-user', usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]) {
+               withCredentials([usernamePassword(credentialsId: 'alttd-snapshot-user', usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]) {
                  sh '''
                    chmod +x gradlew
-                   ./gradlew publish -PalttdDevPublishUser=$USERNAME -PalttdDevPublishPass=$PASSWORD
+                   ./gradlew publish -PalttdSnapshotUsername=$USERNAME -PalttdSnapshotPassword=$PASSWORD
                  '''
                }
             }