Force corepack version to fix CI actions errors

[emma-imber]

What does this change?

Forces specific version of corepack to fix CI actions errors. Copying what was done here: https://github.com/guardian/ad-manager-line-items-jobs/pull/19

[changeset-bot]

⚠️ No Changeset found

Latest commit: 92de2ad

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

Deploy build 3069 of dotcom::commercial-bundle to CODE

All deployment options

• Deploy build 3069 of dotcom::commercial-bundle to CODE
• Deploy parts of build 3069 to CODE by previewing it first
• What's on CODE right now?

---

From guardian/actions-riff-raff.

[github-actions]

Ad load time test results

For consented, top-above-nav took on average 4204ms to load.
For consentless, top-above-nav took on average 3545ms to load.

Test conditions:

• 5mbps download speed
• 1.5mbps upload speed
• 150ms latency

[prout-bot]

Seen on PROD (merged by @emma-imber 1 minute and 59 seconds ago) Please check your changes!