fix missing k8s version

Author: Medhakulam

k8s_version.json

@@ -53,10 +53,13 @@
     "1.29.8",
     "1.29.9",
     "1.29.10",
+    "1.29.12",
     "1.30.4",
     "1.30.5",
     "1.30.6",
-    "1.31.1"
+    "1.30.8",
+    "1.31.1",
+    "1.31.4"
   ],
   "rke2": [
     "1.26.4",
@@ -91,11 +94,14 @@
     "1.29.8",
     "1.29.9",
     "1.29.10",
+    "1.29.12",
     "1.30.3",
     "1.30.4",
     "1.30.5",
     "1.30.6",
-    "1.31.1"
+    "1.30.8",
+    "1.31.1",
+    "1.31.4"
   ],
   "kubeadm-fips": [
     "1.26.4",
@@ -120,10 +126,13 @@
     "1.29.8",
     "1.29.9",
     "1.29.10",
+    "1.29.12",
     "1.30.4",
     "1.30.5",
     "1.30.6",
-    "1.31.1"
+    "1.30.8",
+    "1.31.1",
+    "1.31.4"
   ],
   "nodeadm": [
     "1.29.0",