Bump versions.spring from 5.3.37 to 5.3.39

Bumps `versions.spring` from 5.3.37 to 5.3.39.

Updates `org.springframework:spring-context-support` from 5.3.37 to 5.3.39
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.37...v5.3.39)

Updates `org.springframework:spring-test` from 5.3.37 to 5.3.39
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.37...v5.3.39)

---
updated-dependencies:
- dependency-name: org.springframework:spring-context-support
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

gradle/dependencies.gradle

@@ -6,7 +6,7 @@
 ext {
     versions = [
             spring_boot                      : '2.7.18',
-            spring                           : '5.3.37',
+            spring                           : '5.3.39',
             spring_security                  : '5.8.13',
             spring_security_jwt              : '1.1.1.RELEASE',
             jcip_annotations                 : '1.0',