Update dependency phoenix_live_dashboard to ~> 0.8.0

[renovate]

This PR contains the following updates:

Package	Update	Change
phoenix_live_dashboard	minor	~> 0.7.2 -> ~> 0.8.0

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Configuration

📅 Schedule: Branch creation - "* * * * 0,6" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: mix.lock

Command failed: docker run --rm --name=renovate_a_sidecar --label=renovate_a_child --memory=3584m -v "/tmp/worker/6bc1fa/2a54e5/repos/github/mreishus/demon_spirit_umbrella":"/tmp/worker/6bc1fa/2a54e5/repos/github/mreishus/demon_spirit_umbrella" -v "/tmp/worker/6bc1fa/2a54e5/cache":"/tmp/worker/6bc1fa/2a54e5/cache" -e CONTAINERBASE_CACHE_DIR -w "/tmp/worker/6bc1fa/2a54e5/repos/github/mreishus/demon_spirit_umbrella/apps/demon_spirit_web" ghcr.io/containerbase/sidecar:9.24.0 bash -l -c "install-tool erlang 26.1.2.0 && install-tool elixir v1.15.7 && mix deps.update phoenix_live_dashboard"
** (Mix) Hex dependency resolution failed