Bump flywayVersion from 10.3.0 to 10.4.1 in /springboot-app (#99)

Bumps `flywayVersion` from 10.3.0 to 10.4.1.

Updates `org.flywaydb:flyway-core` from 10.3.0 to 10.4.1
- [Release notes](https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-10.3.0...flyway-10.4.1)

Updates `org.flywaydb:flyway-database-postgresql` from 10.3.0 to 10.4.1

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

springboot-app/build.gradle.kts

@@ -14,7 +14,7 @@ repositories {
 }
 
 val springCloudVersion = "2023.0.0"
-val flywayVersion = "10.3.0"
+val flywayVersion = "10.4.1"
 
 dependencies {
   implementation("org.springframework.boot:spring-boot-starter-webflux")