Bump io.reactivex.rxjava3:rxjava from 3.1.8 to 3.1.9 (#479)

Bumps [io.reactivex.rxjava3:rxjava](https://github.com/ReactiveX/RxJava) from 3.1.8 to 3.1.9.
- [Release notes](https://github.com/ReactiveX/RxJava/releases)
- [Commits](ReactiveX/RxJava@v3.1.8...v3.1.9)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -79,7 +79,7 @@
     <slf4j.version>1.7.36</slf4j.version>
     <log4j.version>2.23.1</log4j.version>
     <rxjava.version>2.2.21</rxjava.version>
-    <rxjava3.version>3.1.8</rxjava3.version>
+    <rxjava3.version>3.1.9</rxjava3.version>
     <api.comparison.version>5.2</api.comparison.version>
     <hc.animal-sniffer.signature.ignores>javax.net.ssl.SSLEngine,javax.net.ssl.SSLParameters,java.nio.ByteBuffer,java.nio.CharBuffer</hc.animal-sniffer.signature.ignores>
   </properties>