Bump spring-core from 5.3.18 to 5.3.19

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.3.18 to 5.3.19.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.18...v5.3.19

)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
...

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

pom.xml

@@ -25,7 +25,7 @@
         <!-- This version must match the version of cxf-spring-boot-starter-jaxrs:${cxf.version}'s spring-boot-starter dependency (at least MAJOR.MINOR parts). 2.6.1 depends on Spring-core 5.3.13 which have 1 vulnerability. -->
         <spring-boot-starter.version>2.6.3</spring-boot-starter.version>
         <!-- Spring Core version. Must match the version of spring-boot-starter:${spring-boot-starter.version}'s spring-core dependency version (at least MAJOR.MINOR part). -->
-        <spring.version>5.3.18</spring.version>
+        <spring.version>5.3.19</spring.version>
         <!-- logback-* version, must match the version of spring-boot-starter-logging:${spring-boot-starter.version}'s logback-classic dependency (at least MAJOR.MINOR part). -->
         <logback.version>1.2.10</logback.version>
         <spotbugs.version>4.5.3</spotbugs.version>