chore(deps): update dependency @sourcegraph/eslint-config to ^0.31.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sourcegraph/eslint-config	^0.30.0 -> ^0.31.0

Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.

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Release Notes

sourcegraph/eslint-config

### [`v0.31.0`](https://togithub.com/sourcegraph/eslint-config/releases/tag/v0.31.0) [Compare Source](https://togithub.com/sourcegraph/eslint-config/compare/v0.30.0...v0.31.0) ##### Features - disable unicorn/number-literal-case ([#​255](https://togithub.com/sourcegraph/eslint-config/issues/255)) ([3c04ae6](https://togithub.com/sourcegraph/eslint-config/commit/3c04ae6d004149747fe93eb93953292aa006e2f7))

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Configuration

📅 Schedule: Branch creation - "" in timezone America/Los_Angeles, Automerge - At any time (no schedule defined).

🚦 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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