chore: add all EKS versions under standard support for nodeadm (#323)

* chore: add all supported EKS versions for nodeadm
---------

Signed-off-by: Tyler Gillson <[email protected]>

Author: TylerGillson

k8s_version.json

@@ -122,6 +122,7 @@
   ],
   "nodeadm": [
     "1.29.0",
-    "1.30.0"
+    "1.30.0",
+    "1.31.0"
   ]
 }