docs(aws-eks-addon): add configuration snippet for sane commit/pr mes…

[fbreckle]

Changes

This PR adds a small snippet to the example configuration at https://docs.renovatebot.com/modules/datasource/aws-eks-addon/ that makes the commits, PRs and branch names for aws-eks-addons more readable (read: usable).

Context

Because this datasource uses a minified JSON object as depName and depName is used pretty much everywhere in renovate's PRs, the default names without this snippet are terrible.

To save everyone's time, it should be in the example configuration. I suppose virtually every user of this feature will want to have that snippet (or will spend time building something similar).

Before this change:

After this change:

Functionally, the change uses overrideDepName to extract the addonName from the minified-JSON depName.

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 40.27.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 40.27.0

Your semantic-release bot 📦🚀