Included in v0.0.20

Prior to v0.0.20, check-spelling produced a number of (generally) tiny files which it used to produce a comment in a secondary pass.

Occasionally actions/upload-artifact / actions/download-artifact would hit some error on some of the files and trigger a backoff that would take a while to resolve.

Instead of trying to upload a half dozen or so tiny files, check-spelling will now zip the files proactively before uploading, and unzip them after.

• If someone upgrades the check job to a version that does this, but doesn't upgrade the comment job to a version that supports this, the generated artifacts will not work.
• If a workflow has custom code relying on the files from artifact, it will need to be adjusted. -- I doubt anyone is doing this.