Revert "Rename `dependabot.yaml` to `dependabot.yml` in hopes for fixing it"

This reverts commit 48af0517965cbecff20bf54b39def9ac8ff0a690.
diff --git a/.github/dependabot.yml b/.github/dependabot.yaml
similarity index 100%
rename from .github/dependabot.yml
rename to .github/dependabot.yaml