have publish and health workflow use the beta sdk

Author: devoncarew

.github/workflows/health.yaml

@@ -10,5 +10,6 @@ jobs:
     with:
       ignore_coverage: "**.mock.dart,**.g.dart"
       ignore_license: "**.mock.dart,**.g.dart,**.mocks.dart,pkgs/platform/*"
+      sdk: beta
     permissions:
       pull-requests: write

.github/workflows/publish.yaml

@@ -13,6 +13,7 @@ jobs:
     if: ${{ github.repository_owner == 'dart-lang' }}
     uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main
     with:
+      sdk: beta
       write-comments: false
     permissions:
       id-token: write