fix(mta): update docker image to fix npm.sap.com ssl issue (#1021)

* fix(mta): update docker image to fix npm.sap.com ssl issue

see SAP/cloud-mta-build-tool#611

Author: CCFenner

resources/default_pipeline_environment.yml

@@ -337,7 +337,7 @@ steps:
     classic:
       dockerImage: 'ppiper/mta-archive-builder'
     cloudMbt:
-      dockerImage: 'devxci/mbtci:1.0.1'
+      dockerImage: 'devxci/mbtci:1.0.4'
   neoDeploy:
     dockerImage: 'ppiper/neo-cli'
     deployMode: 'mta'