Bump io.reactivex.rxjava3:rxjava from 3.1.6 to 3.1.8

Bumps [io.reactivex.rxjava3:rxjava](https://github.com/ReactiveX/RxJava) from 3.1.6 to 3.1.8.
- [Release notes](https://github.com/ReactiveX/RxJava/releases)
- [Commits](https://github.com/ReactiveX/RxJava/compare/v3.1.6...v3.1.8)

---
updated-dependencies:
- dependency-name: io.reactivex.rxjava3:rxjava
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

redisson/pom.xml

@@ -95,7 +95,7 @@
         <dependency>
             <groupId>io.reactivex.rxjava3</groupId>
             <artifactId>rxjava</artifactId>
-            <version>3.1.6</version>
+            <version>3.1.8</version>
         </dependency>
 
         <dependency>