Bump release-drafter/release-drafter from 5.20.1 to 5.21.0

Bumps [release-drafter/release-drafter](https://github.com/release-drafter/release-drafter) from 5.20.1 to 5.21.0.
- [Release notes](https://github.com/release-drafter/release-drafter/releases)
- [Commits](release-drafter/release-drafter@06a49bf...df69d58)

---
updated-dependencies:
- dependency-name: release-drafter/release-drafter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/release-drafter.yml

@@ -18,6 +18,6 @@ jobs:
     if: github.repository == 'testcontainers/testcontainers-java'
     runs-on: ubuntu-latest
     steps:
-      - uses: release-drafter/release-drafter@06a49bf28488e030d35ca2ac6dbf7f408a481779 # v5.19.0
+      - uses: release-drafter/release-drafter@df69d584deac33d8569990cb6413f82447181076 # v5.19.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}