Update 'tasks/spladder_merge.wdl'

tasks/spladder_merge.wdl

@@ -44,7 +44,7 @@ task spladder_merge {
     runtime {
         docker: docker
         cluster: cluster
-        systemDisk: "cloud_ssd 500"
+        systemDisk: "cloud_ssd 50"
         dataDisk: "cloud_ssd " + disk_size + " /cromwell_root/"
     }