[rennes][abacus22] Change boot-type (bios -> uefi)

data/grid5000/sites/rennes/clusters/abacus22/abacus22.json

 {
-  "boot_type": "bios",
+  "boot_type": "uefi",
   "created_at": "Mon, 04 Dec 2023 00:00:00 GMT",
   "exotic": false,
   "kavlan": false,

input/grid5000/sites/rennes/clusters/abacus22/abacus22.yaml

 model: Dell PowerEdge C6320
 created_at: 2023-12-04
 kavlan: false
-boot_type: bios
+boot_type: uefi
 exotic: false
 queues:
   - admin