chore: add valkey 8.1 to supported versions

Author: Alexandra Zaharia

shared/data/registry.json

@@ -1269,12 +1269,14 @@
     "type": "valkey",
     "versions": {
       "supported": [
+        "8.1",
         "8.0"
       ],
       "deprecated": []
     },
     "versions-dedicated-gen-2": {
       "supported": [
+        "8.1",
         "8.0"
       ],
       "deprecated": []