Fix missing 'v' prefix in Goreleaser brew url_template

[doodlesbykumbi]

What does this PR do?

Fix missing 'v' prefix in Goreleaser brew url_template.

Annoyingly Go releaser strips the 'v' prefix on releases but not on snapshots. I saw the snapshot brew formula urls were double prefixed and mistakenly removed the 'v' from the brew url_template. See my question/complaint over at https://github.com/goreleaser/goreleaser/discussions/2114.

What ticket does this PR close?

Resolves https://github.com/cyberark/homebrew-tools/issues/26

Checklists

Change log

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• [x] This PR does not include user-facing changes and doesn't require a CHANGELOG update

Test coverage

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Documentation

• [ ] Docs (e.g. READMEs) were updated in this PR, and/or there is a follow-on issue to update docs, or
• [x] This PR does not require updating any documentation