Bump postcss from 8.4.31 to 8.4.40

[github-actions]

Dependabot opened a pull request to update a dependency. Please review it: #454

• Comment on this issue tagging Chayn staff (@kyleecodes) to be assigned this issue.
• Follow directions in the Chayn Dependency Upgrade Guide here: https://chayn.notion.site/Chayn-Tech-Contributor-Wiki-5356c7118c134863a2e092e9df6cbc34?pvs=4

[kyleecodes]

@KatherineDonald new issue here. Please comment to be assigned.

Also, check your email for an invitation to become a collaborator on this repository. This is not required, but enables you to review the pull request associated with this issue using GitHub's reviewing interface.

[martagrrez]

Hi @kyleecodes could you please assign to me this issue? 😄

[github-actions]

Thank you @martagrrez you have been assigned this issue!
Please follow the directions in our Contributing Guide. We look forward to reviewing your pull request shortly ✨

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