chore: update mcp-hub version

Author: ravitemer

lua/mcphub/utils/version.lua

@@ -3,7 +3,7 @@ return {
     REQUIRED_NODE_VERSION = { -- Required mcp-hub version
         major = 3,
         minor = 1,
-        patch = 7,
-        string = "3.1.7",
+        patch = 8,
+        string = "3.1.8",
     },
 }