chore: Update target-branch in dependabot.yml to development

[PromoFaux]

What does this PR aim to accomplish?:

Title

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[PromoFaux]

I think we can safely ignore the PHP-CS-Fixer stuff!

[rdwebdesign]

There is also a codespell issue:

requestin ==> requesting

[PromoFaux]

There is also a codespell issue:

Entirely unrelated though

[rdwebdesign]

Yeah... I just noticed it is inside a PHP file.