[gemini] Update gemini-2 bios & BMC firmware

data/grid5000/sites/lyon/clusters/gemini/nodes/gemini-2.json

@@ -7,11 +7,11 @@
     "platform_type": "x86_64"
   },
   "bios": {
-    "release_date": "02/14/2019",
+    "release_date": "06/11/2021",
     "vendor": "American Megatrends Inc.",
-    "version": "S2W_3A08"
+    "version": "S2W_3A12"
   },
-  "bmc_version": "3.30",
+  "bmc_version": "3.38",
   "chassis": {
     "manufacturer": "NVIDIA",
     "name": "DGX-1 with V100-32",