Update dependency @truffle/hdwallet-provider to v2.0.15

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@truffle/hdwallet-provider (source)	2.0.14 -> 2.0.15

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Release Notes

trufflesuite/truffle

### [`v2.0.15`](https://togithub.com/trufflesuite/truffle/compare/0d96061f25e0927cd1d158b1636464ded86a57bb...1fbb6b1680b6c6eef5a98b7f21d7faae30c03994) [Compare Source](https://togithub.com/trufflesuite/truffle/compare/0d96061f25e0927cd1d158b1636464ded86a57bb...1fbb6b1680b6c6eef5a98b7f21d7faae30c03994)

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Configuration

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🚦 Automerge: Enabled.

♻ 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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