chore(deps): bump flyway-version from 9.20.1 to 9.21.0 (#547)

Bumps `flyway-version` from 9.20.1 to 9.21.0.

Updates `org.flywaydb:flyway-core` from 9.20.1 to 9.21.0
- [Release notes](https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-9.20.1...flyway-9.21.0)

Updates `org.flywaydb:flyway-mysql` from 9.20.1 to 9.21.0
- [Release notes](https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-9.20.1...flyway-9.21.0)

---
updated-dependencies:
- dependency-name: org.flywaydb:flyway-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.flywaydb:flyway-mysql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -23,7 +23,7 @@ mariadb-version = "3.1.4"
 sqlite-version = "3.42.0.0"
 mysql-version = "8.1.0"
 rerunner-jupiter-version = "2.1.6"
-flyway-version = "9.20.1"
+flyway-version = "9.21.0"
 selenide-version = "6.16.0"
 lombok-version = "1.18.28"
 jacocoVersion = "0.8.10"