Automatic merge from submit-queue

fix typo on federation/pkg/dnsprovider/plugins.go

**What this PR does / why we need it**: Increase code readability

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**: just fix one minor mistake as first contribution

**Release note**:

```release-note
```