how to change bootVolumeVpusPerGB ?

hello, in this env. file how to change and add this bootVolumeVpusPerGB ? ``` {"sourceType":"image","imageId":"ocid1.image.oc1.ap-landon-1.aaaaaaaafenvfjakf5wtkaghqs3netev5nb35xzxba42ok7rzkcblq6wdnpa","bootVolumeSizeInGBs":110,"bootVolumeVpusPerGB":30} ``` want to change to 10,20,30 or 50 for Specify a custom boot volume size. let me know if gave any changes at file. Thanks