docs: update docker-driver image reference

[trevorwhitney]

What this PR does / why we need it:

We are now publishing both arm64 and amd64 versions of the docker driver image. This PR updates the docs to reflect that.

Which issue(s) this PR fixes:
Re: #15318

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[github-actions]

💻 Deploy preview deleted.

[JStickler]

[docs team] LGTM

[JStickler]

Publishing both as of which release? What branches does this need to be backported to?

[trevorwhitney]

@JStickler as of today, or 3.3.2

[JStickler]

@trevorwhitney I mostly just wanted to make sure if this was in a released release, that we published it to 3.3. Thanks!