build(deps): bump spring-core from 5.2.8.RELEASE to 5.2.9.RELEASE

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.2.8.RELEASE to 5.2.9.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.2.8.RELEASE...v5.2.9.RELEASE)

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

spotbugsTestCases/build.gradle

@@ -18,7 +18,7 @@ dependencies {
   implementation 'com.google.truth:truth:1.0.1'
   implementation 'joda-time:joda-time:2.10.6'
   api 'net.jcip:jcip-annotations:1.0'
-  implementation 'org.springframework:spring-core:5.2.8.RELEASE'
+  implementation 'org.springframework:spring-core:5.2.9.RELEASE'
   compileOnly 'javax.annotation:javax.annotation-api:1.3.2'
   implementation 'org.checkerframework:checker-qual:3.6.0'