📖 Update<amp-consent> policy configuration snippet (#35362)

1. Update snippet to valid JSON
2. Update some wording
3. Unrelated: Fixes `AppConsent` product URL in order to pass `check-links` with this change.

extensions/amp-consent/amp-consent.md

@@ -487,22 +487,11 @@ When one of the pre-defined attributes is used, AMP assumes that the publisher t
 
 ### Customize Consent Blocking Behaviors
 
-An optional `policy` object can be added to the `<amp-consent>` element's JSON configuration object to customize consent blocking behaviors.
+An optional `policy` property can be added to the `<amp-consent>` element's JSON configuration object. Its value is an object that customizes consent blocking behaviors.
 
 ```html
 <amp-consent layout="nodisplay" id="consent-element">
   <script type="application/json">
-    {
-      "checkConsentHref"
-      "consentInstanceId": "ping2"
-      "geo": abc,
-      "extraConfig" : {
-        'id': xxx
-        'config': asdsdfasd,
-      },
-      "postPromptUI": 'test'
-    }
-
     {
       "consentInstanceId": xxx
       "checkConsentHref": "https://example.com/api/show-consent"
@@ -519,7 +508,7 @@ An optional `policy` object can be added to the `<amp-consent>` element's JSON c
 </amp-consent>
 ```
 
-Right now only customizing the `default` policy instance is supported. The "default" behavior policy applies to every component that is blocked by consent with `data-block-on-consent` attribute.
+The `default` policy is the only one allowed to be configured. This policy applies to every element that is blocked by the `data-block-on-consent` attribute.
 
 ### Policy Instance (optional)
 
@@ -664,7 +653,7 @@ Join in on the discussion where we are discussing [upcoming potential features](
 
 ## Supported Consent Management Platforms
 
--   AppConsent : [Website](https://appconsent.io/en) - [Documentation](./cmps/appconsent.md)
+-   AppConsent : [Website](https://sfbx.io/en/produits/) - [Documentation](./cmps/appconsent.md)
 -   ConsentManager : [Website](https://www.consentmanager.net/) - [Documentation](https://help.consentmanager.net/books/cmp/page/using-the-cmp-with-amp-websites)
 -   Didomi : [Website](https://www.didomi.io/) - [Documentation](https://developers.didomi.io/cmp/amp)
 -   iubenda : [Website](https://www.iubenda.com/) - [Documentation](./cmps/iubenda.md)