chore(deps): bump org.assertj:assertj-core in /log-processor

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.24.2 to 3.26.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.24.2...assertj-build-3.26.3)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

log-processor/build.gradle.kts

@@ -40,7 +40,7 @@ dependencies {
     testImplementation("org.springframework.boot:spring-boot-starter-test") {
         exclude(group = "org.junit.vintage", module = "junit-vintage-engine")
     }
-    testImplementation("org.assertj:assertj-core:3.24.2")
+    testImplementation("org.assertj:assertj-core:3.26.3")
     testImplementation("org.springframework.kafka:spring-kafka-test:3.2.3")
 
     // Mockito for mocking