Bump assertj-core from 3.16.1 to 3.18.1

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.16.1 to 3.18.1.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](assertj/assertj@assertj-core-3.16.1...assertj-core-3.18.1)

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

pom.xml

@@ -163,7 +163,7 @@
     <dependency>
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
-      <version>3.16.1</version>
+      <version>3.18.1</version>
       <scope>test</scope>
     </dependency>