Bump assertj-core in /dockerfile-image-update-itest

Bumps assertj-core from 3.23.1 to 3.24.1.

---
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>

Author: dependabot[bot]

dockerfile-image-update-itest/pom.xml

@@ -43,7 +43,7 @@
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.23.1</version>
+            <version>3.24.1</version>
         </dependency>
         <dependency>
             <groupId>commons-io</groupId>