Bump assertj-core from 3.19.0 to 3.20.1

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.19.0 to 3.20.1.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](https://github.com/assertj/assertj-core/compare/assertj-core-3.19.0...assertj-core-3.20.1)

---
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>
diff --git a/pom.xml b/pom.xml
index 7e214d0..a5620b2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -741,7 +741,7 @@
             <dependency>
                 <groupId>org.assertj</groupId>
                 <artifactId>assertj-core</artifactId>
-                <version>3.19.0</version>
+                <version>3.20.1</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.ws.commons.axiom</groupId>