Update all dependencies to v6.1.4

| datasource | package                            | from  | to    |
| ---------- | ---------------------------------- | ----- | ----- |
| maven      | org.springframework:spring-test    | 6.1.3 | 6.1.4 |
| maven      | org.springframework:spring-context | 6.1.3 | 6.1.4 |
| maven      | org.springframework:spring-core    | 6.1.3 | 6.1.4 |

libs.versions.toml

@@ -15,7 +15,7 @@ immutables = "2.10.0"
 exposed = "0.47.0"
 postgresql = "42.7.1"
 mockito = "3.12.4" # Using old version to be compatible with PowerMock
-spring = "6.1.3"
+spring = "6.1.4"
 
 # Common dependencies
 junit = "5.10.2"