Bump scala-steward-org/scala-steward-action from 2.83.0 to 2.84.0

Bumps [scala-steward-org/scala-steward-action](https://github.com/scala-steward-org/scala-steward-action) from 2.83.0 to 2.84.0.
- [Release notes](https://github.com/scala-steward-org/scala-steward-action/releases)
- [Commits](scala-steward-org/scala-steward-action@e47786b...df2a4ce)

---
updated-dependencies:
- dependency-name: scala-steward-org/scala-steward-action
  dependency-version: 2.84.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/scala-steward.yml

@@ -17,7 +17,7 @@ jobs:
         app-id: 89698
         private-key: ${{ secrets.UNFILTERED_APP_KEY }}
     - name: Launch Scala Steward
-      uses: scala-steward-org/scala-steward-action@e47786bae0a964b4202df1d66b65c581a53257b0 # v2.83.0
+      uses: scala-steward-org/scala-steward-action@df2a4cec1721d0b48be3e1d1f0acdf7543ea0fb4 # v2.84.0
       with:
         github-token: ${{ steps.generate_token.outputs.token }}
         author-email: "74865306+unfiltered-app[bot]@users.noreply.github.com"