fix(cypressParallel.sh): refs #6695 improve script readability

Jenkinsfile

@@ -120,7 +120,7 @@ pipeline {
                             }
                             def image = docker.build('lilium-dev', '-f docs/Dockerfile.dev docs')
                             image.inside("--network ${env.COMPOSE_PROJECT}_default -e CI -e TZ") {
-                                sh 'sh test/cypress/cypressParallel.sh 4'
+                                sh 'sh test/cypress/cypressParallel.sh 2'
                             }
                         }
                     }

test/cypress/cypressParallel.sh

@@ -1,4 +1,17 @@
 #!/bin/bash
 
-find 'test/cypress/integration' -mindepth 1 -maxdepth 1 -type d | xargs -P "$1" -I {} sh -c 'echo "🔷 {}" && xvfb-run -a cypress run --headless --browser chromium --spec "{}" --quiet > /dev/null 2>&1'
+find 'test/cypress/integration' \
+    -mindepth 1 \
+    -maxdepth 1 \
+    -type d | \
+xargs -P "$1" -I {} \
+sh -c '''
+    echo "🔷 {}" &&
+    xvfb-run -a cypress run \
+        --headless \
+        --browser chromium \
+        --spec "{}"  \
+        --quiet  \
+        > /dev/null 2>&1
+'''
 wait