This post goes over how to unignore a Dependabot dependency with a GitHub comment.
Ignore Dependency
If you’ve ignored a Dependabot dependency before:
@dependabot ignore this dependency
Or:
@dependabot ignore this major version
Unignore Dependency
You can unignore it with:
@dependabot unignore <dependency name> dependency
Or:
@dependabot unignore <dependency name> <ignore condition>
See example.
Ignore Conditions
Show all of the ignore conditions of the specified dependency:
@dependabot show <dependency name> ignore conditions