Jenkinsfile: fix indentation

contrib/ci/Jenkinsfile

@@ -19,8 +19,8 @@ pipeline {
 	agent { label 'gluon-docker' }
 	environment {
 		GLUON_SITEDIR = "contrib/ci/minimal-site"
-			GLUON_TARGET = "x86-64"
-			BUILD_LOG = "1"
+		GLUON_TARGET = "x86-64"
+		BUILD_LOG = "1"
 	}
 	stages {
 		stage('lint') {
@@ -38,8 +38,8 @@ pipeline {
 		stage('build') {
 			steps {
 				sh 'make update'
-					sh 'test -d /dl_cache && ln -s /dl_cache openwrt/dl || true'
-					sh 'make -j$(nproc) V=s'
+				sh 'test -d /dl_cache && ln -s /dl_cache openwrt/dl || true'
+				sh 'make -j$(nproc) V=s'
 			}
 		}
 	}