Bump dev.openfeature:sdk

Bumps [dev.openfeature:sdk](https://github.com/open-feature/java-sdk) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/open-feature/java-sdk/releases)
- [Changelog](https://github.com/open-feature/java-sdk/blob/main/CHANGELOG.md)
- [Commits](open-feature/java-sdk@v1.5.0...v1.6.0)

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

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

openfeature/provider_tests/java-integration-tests/pom.xml

@@ -24,7 +24,7 @@
         <dependency>
             <groupId>dev.openfeature</groupId>
             <artifactId>sdk</artifactId>
-            <version>1.5.0</version>
+            <version>1.6.0</version>
         </dependency>
         <dependency>
             <groupId>dev.openfeature.contrib.providers</groupId>