fix(ci): Use 1Password-bot token for flake update PRs so approval job runs

[mrjones2014]

Overview

Changes the token used for the flake update CI jobs to use the 1Password-bot users token, so that the approval job runs and github-actions[bot] can apply an approval to the flake.lock update PRs.

Type of change

• [ ] Created a new plugin
• [ ] Improved an existing plugin
• [ ] Fixed a bug in an existing plugin
• [x] Improved contributor utilities or experience

Related Issue(s)

• Resolves: #
• Relates: #459 #456

How To Test

Merge this change, then run a flake.lock update CI job. The PR should be created by 1Password-bot, and github-actions[bot] should provide one approval for it.

Changelog

Use 1Password-bot instead of github-actions[bot] to run the flake.lock update CI jobs.