fix: typo

This should fix the error:

```sh
$ref 'gobalconfiguration' in 'vscode://schemas/settings/configurationDefaults' can not be resolved.```

package.json

@@ -94,7 +94,7 @@
       }]
     },
     "configuration": {
-      "$id": "#gobalconfiguration",
+      "$id": "#globalconfiguration",
       "title": "Front Matter: use frontmatter.json for shared team settings",
       "type": "object",
       "properties": {
@@ -114,7 +114,7 @@
                 "markdownDescription": "Specify if this project is the default project to load."
               },
               "configuration": {
-                "$ref": "#gobalconfiguration"
+                "$ref": "#globalconfiguration"
               }
             }
           }
@@ -2431,4 +2431,4 @@
   "vsce": {
     "dependencies": false
   }
-}
+}