Bump assertj-core from 3.20.2 to 3.21.0 (#370)

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.20.2 to 3.21.0.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.20.2...assertj-core-3.21.0)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -63,7 +63,7 @@
             <dependency>
                 <groupId>org.assertj</groupId>
                 <artifactId>assertj-core</artifactId>
-                <version>3.20.2</version>
+                <version>3.21.0</version>
             </dependency>
             <dependency>
                 <groupId>org.hamcrest</groupId>