chore(deps): bump io.reactivex.rxjava3:rxjava in /snippets

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](ReactiveX/RxJava@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] <[email protected]>

snippets/app/build.gradle

@@ -68,7 +68,7 @@ dependencies {
     implementation 'androidx.navigation:navigation-ui-ktx:2.5.3'
     implementation 'com.android.volley:volley:1.2.1'
     implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.5.1'
-    implementation 'io.reactivex.rxjava3:rxjava:3.1.6'
+    implementation 'io.reactivex.rxjava3:rxjava:3.1.8'
     implementation 'com.google.android.libraries.places:places:3.0.0'
     gmsImplementation 'com.google.maps.android:maps-ktx:3.4.0'
     gmsImplementation 'com.google.maps.android:maps-compose:2.14.0'