Bump org.flywaydb:flyway-core from 10.2.0 to 10.3.0 in /springboot-app

Bumps [org.flywaydb:flyway-core](https://github.com/flyway/flyway) from 10.2.0 to 10.3.0.
- [Release notes](https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-10.2.0...flyway-10.3.0)

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

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

springboot-app/build.gradle.kts

@@ -20,7 +20,7 @@ dependencies {
   implementation("org.springframework.cloud:spring-cloud-starter-vault-config")
 
   implementation("org.springframework.boot:spring-boot-starter-jdbc")
-  implementation("org.flywaydb:flyway-core:10.2.0")
+  implementation("org.flywaydb:flyway-core:10.3.0")
   implementation("org.flywaydb:flyway-database-postgresql:10.2.0")
   implementation("org.postgresql:postgresql:42.7.1")