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

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-8.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-9.json

...id5000/sites/grenoble/clusters/genepi/nodes/genepi-1.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-10.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-11.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-12.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-13.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-14.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-15.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-16.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-17.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-18.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-19.json

...id5000/sites/grenoble/clusters/genepi/nodes/genepi-2.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-20.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-21.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-22.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-23.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-24.json

...d5000/sites/grenoble/clusters/genepi/nodes/genepi-25.json