docs: changing shopping card to shopping cart

[aqueeb]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

I saw a spelling mistake and I'm just submitting a fix for it.

Test Plan

Not needed as this is just a docs change.

Test links

Not needed as this is just a docs change.

Related issues/PRs

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟢 90	🟢 97	🟢 92	🟢 100	🟢 90	Report
/docs/installation	🟠 78	🟢 100	🟢 92	🟢 100	🟢 90	Report

[Josh-Cena]

Thanks for taking time to update all pages!

[aqueeb]

Thanks for taking time to update all pages!

You're most welcome!