arrow

MINOR: [Go] Bump golang.org/x/sync from 0.7.0 to 0.8.0 in /go (#43569)

Bumps [golang.org/x/sync](https://github.com/golang/sync) from 0.7.0 to 0.8.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/golang/sync/commit/411f99ef121375a146e962b6eab78b03b7429483"><code>411f99e</code></a> LICENSE: update per Google Legal</li>
<li>See full diff in <a href="https://github.com/golang/sync/compare/v0.7.0...v0.8.0">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=golang.org/x/sync&package-manager=go_modules&previous-version=0.7.0&new-version=0.8.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@ dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@ dependabot rebase` will rebase this PR
- `@ dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@ dependabot merge` will merge this PR after your CI passes on it
- `@ dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@ dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@ dependabot reopen` will reopen this PR if it is closed
- `@ dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@ dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@ dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@ dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@ dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

Authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: Matt Topol <zotthewizard@gmail.com>