build(deps): bump springBootVersion from 2.3.5.RELEASE to 2.4.1

Bumps `springBootVersion` from 2.3.5.RELEASE to 2.4.1.

Updates `spring-boot-starter-test` from 2.3.5.RELEASE to 2.4.1
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.5.RELEASE...v2.4.1)

Updates `spring-boot-starter-jdbc` from 2.3.5.RELEASE to 2.4.1
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.5.RELEASE...v2.4.1)

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

Author: dependabot-preview[bot]

build.gradle

@@ -21,7 +21,7 @@ dependencies {
     def logbackVersion = '1.2.3'
     def postgresqlVersion = '42.2.18'
     def testcontainersVersion = '1.15.0'
-    def springBootVersion = '2.3.5.RELEASE'
+    def springBootVersion = '2.4.1'
 
     implementation "ch.qos.logback:logback-classic:$logbackVersion"