build(deps): bump org.assertj:assertj-core from 3.26.3 to 3.27.7 (DSpace#12246)

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.26.3 to 3.27.7.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.26.3...assertj-build-3.27.7)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-version: 3.27.7
  dependency-type: direct:production
...

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Author: dependabot[bot]

pom.xml

@@ -1808,7 +1808,7 @@
             <dependency>
                 <groupId>org.assertj</groupId>
                 <artifactId>assertj-core</artifactId>
-                <version>3.26.3</version>
+                <version>3.27.7</version>
                 <scope>test</scope>
             </dependency>
             <!-- H2 is an in-memory database used for Unit/Integration tests -->