ci: disable dependabot (#22295)
ci: disable dependabot (#22295)

Disable dependabot while we reassess our dependency management and ensure
that we have an effective solution.
DevVersion/material2,angular/components,angular/components,andrewseguin/material2,mmalerba/material2,angular/components,angular/components,crisbeto/material2,DevVersion/material2,mmalerba/material2,josephperrott/material2,josephperrott/material2,andrewseguin/material2,DevVersion/material2,DevVersion/material2,mmalerba/material2,josephperrott/material2,andrewseguin/material2,DevVersion/material2,crisbeto/material2,josephperrott/material2,crisbeto/material2,mmalerba/material2,mmalerba/material2,andrewseguin/material2,andrewseguin/material2,crisbeto/material2,josephperrott/material2