fix(deps): update netlify packages

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build (source)	29.46.5 -> 29.47.0
@netlify/config (source)	20.14.1 -> 20.15.0

---

Release Notes

netlify/build (@​netlify/build)

v29.47.0

Compare Source

Features

• populate Blobs context in build plugins (#​5571) (e037fbf)

Dependencies

• The following workspace dependencies were updated
  • dependencies
    • @​netlify/config bumped from ^20.14.1 to ^20.15.0

netlify/build (@​netlify/config)

v20.15.0

Compare Source

Features

• add new endpoint that uses flags and accountId (#​5700) (07def29)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

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

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

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

---

This PR has been generated by Mend Renovate. View repository job log here.

[github-actions]

📊 Benchmark results

Comparing with bc18db2

• Dependency count: 1,322 (no change)
• Package size: 446 MB ⬇️ 0.00% decrease vs. bc18db2
• Number of ts-expect-error directives: 978 (no change)