Docs: polish README.md

[dpprdan]

These changes make the README a bit more comprehensible (IMHO) and fixes a few typos.

I propose to discuss the changes for this single README first and then roll the changes out to the others as well (either with this or another PR).

cf #653

[dpprdan]

This sentence is still a bit too terse IMHO:

You can decide how often you want updates by referencing a semantic version of each image.

Which updates are meant here?

[samruddhikhandale]

Thank you for taking the time to polish the README, we appreciate it ✨

Left one comment, besides that looks good to me!

[bamurtaugh]

Thanks so much for taking the time to put this together, @dpprdan!

[bamurtaugh]

Thanks so much for taking the time to put this together, @dpprdan! (updating to "comment" rather than "approve" as that's the feedback level I meant initially, as we're still actively discussing a few things😄)

[dpprdan]

@bamurtaugh How would like to proceed here? Can this PR be merged?

[bamurtaugh]

Thanks for your contribution and collaboration!

[bamurtaugh]

@samruddhikhandale are you okay with approving the workflow run here? Since that's more your area of expertise, I'll hold off.

[samruddhikhandale]

Apologies for a late review, looks like this PR slipped through the gaps.

Thanks @bamurtaugh for looping me in. Overall the PR looks great, left one minor comment.