Found 4 link issues

[github-actions[bot]]

Link issues by awesome_bot

Line	Status	Link
93	301	https://www.packtpub.com/product/magento-2-developer-s-guide/9781785886584 redirects to https://www.packtpub.com/product/magento-2-developers-guide/9781785886584
106	301	https://mage.coach/ redirects to https://magecoach.raybogman.com/
398	301	https://www.121ecommerce.com/resources/blog/ redirects to https://121ecommerce.com/resources/blog/
621	302	https://campus.m.academy/home redirects to https://campus.m.academy/

[aleron75]

Fixed in commit c1bdcc6