[grat] update microcode version

data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json

@@ -310,7 +310,7 @@
     "ht_capable": true,
     "instruction_set": "x86-64",
     "microarchitecture": "Zen 3",
-    "microcode": "0xa001173",
+    "microcode": "0xa0011d1",
     "model": "AMD EPYC",
     "other_description": "AMD EPYC 7513 32-Core Processor",
     "vendor": "AMD",