chore(deps): update ddsketch-agent digest to dc8f4b9

[dd-octo-sts]

This PR contains the following updates:

Package	Type	Update	Change
ddsketch-agent	workspace.dependencies	digest	f47a7ef → dc8f4b9

[dd-octo-sts]

⚠️ 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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --workspace
    Updating git repository `https://github.com/DataDog/saluki`
error: no matching package named `ddsketch-agent` found
location searched: Git repository https://github.com/DataDog/saluki?rev=dc8f4b9fa226d1e07c8f543aeb6c9be065706881
required by package `ducks v0.1.0 (/tmp/renovate/repos/github/DataDog/lading/integration/ducks)`