[Nantes] update bmc ecotype 6

data/grid5000/sites/nantes/clusters/ecotype/nodes/ecotype-6.json

@@ -11,7 +11,7 @@
     "vendor": "Dell Inc.",
     "version": "2.15.0"
   },
-  "bmc_version": "2.83.83.83",
+  "bmc_version": "2.86.86.86",
   "chassis": {
     "manufactured_at": "2017-07-11",
     "manufacturer": "Dell Inc.",

input/grid5000/sites/nantes/clusters/ecotype/nodes/ecotype-6.yaml

@@ -11,7 +11,7 @@ ecotype-6:
     release_date: 06/27/2022
     vendor: Dell Inc.
     version: 2.15.0
-  bmc_version: 2.83.83.83
+  bmc_version: 2.86.86.86
   chassis:
     manufacturer: Dell Inc.
     name: PowerEdge R630