chore: run ddev utility addon-update-checker

[stasadev]

The Issue

$ ddev utility addon-update-checker
ERROR: Actions needed:
- .gitattributes should contain '.editorconfig', see upstream file https://github.com/ddev/ddev-addon-template/blob/main/.gitattributes
- .editorconfig is missing, see upstream file https://github.com/ddev/ddev-addon-template/blob/main/.editorconfig
Exit code: 1

How This PR Solves The Issue

Fixes it.

Manual Testing Instructions

ddev add-on get https://github.com/ddev/ddev-adminer/tarball/refs/pull/REPLACE_ME_WITH_THIS_PR_NUMBER/head
ddev restart

Automated Testing Overview

Release/Deployment Notes