Bump assertj-core from 3.20.2 to 3.21.0

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>

pom.xml

@@ -87,7 +87,7 @@
         <smallrye-common-annotation.version>1.6.0</smallrye-common-annotation.version>
 
         <junit.version>5.8.0</junit.version>
-        <assertj-core.version>3.20.2</assertj-core.version>
+        <assertj-core.version>3.21.0</assertj-core.version>
         <junit4.version>4.13.2</junit4.version>
         <awaitility.version>4.1.0</awaitility.version>
         <testng.version>7.4.0</testng.version>