Bump spring-core from 5.3.20 to 5.3.21 (#2661)
Bump spring-core from 5.3.20 to 5.3.21 (#2661)

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.3.20 to 5.3.21.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.20...v5.3.21)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
hazendaz/assertj-core,hazendaz/assertj-core,assertj/assertj-core,assertj/assertj-core