chore(deps): bump org.testcontainers:openfga in /examples/servlet

Bumps [org.testcontainers:openfga](https://github.com/testcontainers/testcontainers-java) from 1.20.0 to 1.20.4.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.0...1.20.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:openfga
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

examples/servlet/build.gradle

@@ -22,5 +22,5 @@ dependencies {
     implementation 'dev.openfga:openfga-spring-boot-starter:0.0.1'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testImplementation 'org.springframework.boot:spring-boot-testcontainers'
-    testImplementation 'org.testcontainers:openfga:1.20.0'
+    testImplementation 'org.testcontainers:openfga:1.20.4'
 }