buildkit: update revision to v0.8.0 tag's commit

[mikesep]

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It appears that buildkit was retagged not long after this formula was bumped to v0.8.0 in #66110.

I'm not sure if the formula needs an additional revision 1 to make the difference between the original v0.8.0 clear.

[carlocab]

Thanks, @mikesep.

[fxcoudert]

I requires a revision bump, yes. But most importantly, it requires confirmation from upstream that they indeed meant to retag, and that it was not done in error or maliciously.

[mikesep]

@tonistiigi, a member of the BuildKit repo, says

Yes, this is correct. The commit at v0.8.0~1 was tagged for an hour or so but we couldn't release it because of a pipeline issue.

[BrewTestBot]

🤖 A scheduled task has triggered a merge.