Stop explicitly specifying dot: true

Per actions/labeler#316 (comment) the `dot: true` option in `.github/workflows/labeler.yml` can be removed, as `dot` is now set to `true` by default in v5.0.0

Author: vilkinsons

.github/workflows/labeler.yml

@@ -8,5 +8,4 @@ jobs:
     steps:
       - uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9 # v5.0.0
         with:
-          dot: true
           repo-token: "${{ secrets.GITHUB_TOKEN }}"