tools: fix v8-update workflow

[targos]

• Add a step that configures Git so the update script can create commits.
• Use peter-evans/create-pull-request as it's more maintained and correctly handles commits that are created before it runs.

Refs: https://github.com/peter-evans/create-pull-request

[nodejs-github-bot]

Review requested:

• [ ] @nodejs/actions
• [ ] @nodejs/security-wg
• [ ] @nodejs/v8-update

[targos]

See discussion in https://github.com/nodejs/node/pull/52845 And test with the new config on my fork: https://github.com/targos/node/pull/17

[nodejs-github-bot]

Landed in 5f96db7270818f32ab441ff19c008b5677a4a604

[targos]

It worked 🎉 https://github.com/nodejs/node/pull/52980