Bump io.reactivex.rxjava3:rxjava from 3.1.7 to 3.1.8

Bumps [io.reactivex.rxjava3:rxjava](https://github.com/ReactiveX/RxJava) from 3.1.7 to 3.1.8.
- [Release notes](https://github.com/ReactiveX/RxJava/releases)
- [Commits](ReactiveX/RxJava@v3.1.7...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] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -40,8 +40,8 @@ compileJava {
 }
 
 dependencies {
-    implementation 'io.reactivex.rxjava3:rxjava:3.1.7'
-    implementation 'io.reactivex.rxjava3:rxjava:3.1.7'
+    implementation 'io.reactivex.rxjava3:rxjava:3.1.8'
+    implementation 'io.reactivex.rxjava3:rxjava:3.1.8'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
     testImplementation 'org.mockito:mockito-core:5.5.0'
     testImplementation 'org.assertj:assertj-core:3.24.2'