Fix code example of plugin policy

[fenghan34]

What does it do?

Remove the redundant curly bracket and comma.

Change following code

module.exports = (policyContext, config, { strapi }) => {
    if (ctx.state.user && ctx.state.user.isActive) {
      return true;
    }

    return false;
  },
};

to

module.exports = (policyContext, config, { strapi }) => {
    if (ctx.state.user && ctx.state.user.isActive) {
      return true;
    }

    return false;
};

Why is it needed?

To make this example code valid.

Related issue(s)/PR(s)

[strapi-cla]

All committers have signed the CLA.

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Name	Status	Preview	Updated
documentation	✅ Ready (Inspect)	Visit Preview	Nov 25, 2022 at 10:48AM (UTC)
documentation-docu-mvp	❌ Failed (Inspect)		Nov 25, 2022 at 10:48AM (UTC)

[stb13579]

LGTM! Thanks @fenghan34

[strapi-bot]

This pull request has been mentioned on Strapi Community Forum. There might be relevant details there:

https://forum.strapi.io/t/new-documentation-release-strapi-v4-5-3/23929/1