Fix carbon ads and nuxt target 'static' #439

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• is this issue affecting a production system? (yes/no):

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What are you trying to achieve or the steps to reproduce?

const some = 'properly formatted code example';

What was the result you got?

When building the website using target: 'static' in nuxt.config.js the carbon ads script tag is not added to the DOM hence ads are not showing up.

What result did you expect?

Ads should be displayed. We've removed the target: 'static' for now (#438)

Perhaps the problem comes from the mounted lifecycle which is not triggered when generating the website statically.