[grenoble] Update ram_size for g5k-checks v0.5 (#6119)

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json