fix: growth of content container to take all the available space

[pulkit-30]

fixes: #8369

Issue fix: To prevent content container growth, to take all the available space.

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Motivation

Test Plan

Test links

• https://deploy-preview-8409--docusaurus-2.netlify.app/tests/docs/doc-with-another-sidebar

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ref: changes:

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⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟢 92	🟢 97	🟢 100	🟢 100	🟢 90	Report
/docs/installation	🟠 81	🟢 100	🟢 100	🟢 100	🟢 90	Report

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[slorber]

Thanks for trying

Unfortunately it doesn't work as expected. We want the footer to reach the end of our page here.

[slorber]

curious, do you have and ref doc mentioning this "none" value?

According to what I find it's only valid when using flex: 'none' but not as a 3rd position?

[pulkit-30]

Sorry, I miss that thing...
trying again

[pulkit-30]

Thanks for trying
Unfortunately it doesn't work as expected. We want the footer to reach the end of our page here.

Let me try again!

[slorber]

This is a better fix: #8463