remove explicit scala-steward-version

Author: xuwei-k

.github/workflows/scala-steward.yml

@@ -23,4 +23,3 @@ jobs:
         github-token: ${{ steps.generate_token.outputs.token }}
         author-email: "74864734+foundweekends-bot[bot]@users.noreply.github.com"
         author-name: "foundweekends-bot[bot]"
-        scala-steward-version: 0.10.0