Bump dev.openfga:openfga-sdk from 0.7.0 to 0.8.1 in /modules/openfga

Bumps [dev.openfga:openfga-sdk](https://github.com/openfga/java-sdk) from 0.7.0 to 0.8.1.
- [Release notes](https://github.com/openfga/java-sdk/releases)
- [Changelog](https://github.com/openfga/java-sdk/blob/main/CHANGELOG.md)
- [Commits](openfga/java-sdk@v0.7.0...v0.8.1)

---
updated-dependencies:
- dependency-name: dev.openfga:openfga-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

modules/openfga/build.gradle

@@ -4,7 +4,7 @@ dependencies {
     api project(':testcontainers')
 
     testImplementation 'org.assertj:assertj-core:3.27.3'
-    testImplementation 'dev.openfga:openfga-sdk:0.7.0'
+    testImplementation 'dev.openfga:openfga-sdk:0.8.2'
 }
 
 test {