Reference tweaks for new guides (#7845)
* Update faqs.astro
* Update devops-shift-left-testing.md
* Update devops-principles.md
* Update devops-best-practices.md
* Update frontend-job-description.md
* Update how-to-become-frontend-developer.md
* Update frontend-languages.md
* Update frontend-developer-skills.md
* Update frontend.md
* Update css-variables.md
* Update devops-automation.md
* Update faqs.astro
* Update how-to-become-devops-engineer.md
* Update devops-career-path.md
* Update devops-vs-full-stack.md
* Update devops-principles.md
* Update devops-automation.md
* Update devops-lifecycle.md
* Update devops-shift-left-testing.md
* Update backend-languages.md
* Update backend-developer-skills.md
* Update backend-project-ideas.md
* Update backend-job-description.md
* Update devops-best-practices.md
* Update devops-career-path.md
* Update devops-lifecycle.md
* Update devops-principles.md
* Update devops-shift-left-testing.md
* Update devops-shift-left-testing.md
* Update devops-skills.md
* Update devops-vs-full-stack.md
* Update how-to-become-devops-engineer.md
* Update frontend-developer-skills.md
* Update frontend-job-description.md
* Update frontend-languages.md
* Update frontend-web-developer-portfolio.md
* Update how-to-become-frontend-developer.md
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