(docs): change progress-circle to progress-spinner

[alexisbmills]

Fix broken link and change docs to reflect renaming progress-circle to progress-spinner

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[devversion]

Can you try to align the pipes in this file?

[alexisbmills]

Aha, no problem.

[devversion]

Thanks

[devversion]

LGTM.

The CLA signed seems to be necessary here.

[alexisbmills]

I signed the CLA prior to the pull request. Does it perhaps take some time to register?

[devversion]

@alexisbmills The problem is that the commits aren't signed with the email you're using for GitHub and the CLA.

[googlebot]

CLAs look good, thanks!

[jelbourn]

LGTM, thanks!

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