[WIP] Update CONTRIBUTING.md based on review comments

[Copilot]

Thanks for the feedback on #5762. I've created this new PR, which merges into #5762, to address your comment. I will work on the changes and keep this PR's description up to date as I make progress.

Original PR: #5762
Triggering review: #5762 (comment)

@copilot open a new pull request to apply changes based on this feedback

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[compulim]

@copilot are you still working on this?

[Copilot]

@copilot are you still working on this?

The changes are complete. The CONTRIBUTING.md was updated in commit 16e0db9 with the following fixes:

• Fixed numbered list items (renumbered from 3,4,5,6 to 4,5,6,7)
• Updated "Start a container swarm with hosted Chrome" → "Start Docker Compose/Selenium Grid with hosted Chrome"
• Fixed grammar: "CI pipeline use" → "CI pipeline uses"
• Fixed typo: "All of use" → "All of us"
• Fixed "checkout" → "check out"