Update e18e dependency diffing action

[delucis]

Changes

• Updates the dependency diffing action to 1.7.1. Primarily to fix a bug for PRs from branches that were behind main where they would report changes that were inaccurate as you can see in Make create-astro tests local #17688 (comment) for example. The issue should be fixed by fix: use base sha for PRs instead of ref e18e/action-dependency-diff#177 which is included in the 1.7.1 release.
• Versions 1.6 and 1.7 updated internal dependencies, improved trusted publishing checks, and fixed duplicate scanning (a feature we don’t use) so otherwise should be a safe update.

Testing

Tested upstream, 🤞

Docs

n/a

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Latest commit: baa691b

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[trueberryless]

Nice team work getting this fixed 👏

Looks good to me ✅