Update shared-constants.mdx to explicitly call out the default value …

…for dataPath

The docs used the word "enable" that made us think that if a `dataPath` isnt provided, the constants will not be overridable through content. However, looking at the code thats not true

https://github.com/player-ui/player/blob/7e2c1a691ea8e0aae1f2c412d145dcb4749d7164/plugins/shared-constants/core/src/index.ts#L45

docs/site/src/content/docs/plugins/multiplatform/shared-constants.mdx

@@ -23,7 +23,7 @@ const constantsPlugin = new ConstantsPlugin({
     prop2: "B",
   },
   namespace: "constants",
-  dataPath: "data.constants",
+  dataPath: "data.props",
 });
 
 const player = new Player({
@@ -42,12 +42,12 @@ constantsPlugin.getConstants("prop1"); // 'A'
 
 ### Overriding Values in Content
 
-The `dataPath` configuration option enables content to override specific values for a particular flow:
+The `dataPath` configuration option allows content to override specific values for a particular flow:
 
 ```json
 {
   "data": {
-    "constants": {
+    "props": {
       "prop1": "B"
     }
   }
@@ -56,6 +56,17 @@ The `dataPath` configuration option enables content to override specific values
 
 using a similar query for `prop1`, the value in the content takes precidence and would return `B`.
 
+If no `dataPath` is defined, then it defaults to `constants` and you can still do this
+```json
+{
+  "data": {
+    "constants": {
+      "prop1": "B"
+    }
+  }
+}
+```
+
 ### Fallback Values
 
 Any query can also specify an optional _default_ value to return: