fix(deps): update dependency io.reactivex.rxjava3:rxjava to v3.1.6 (#241)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-managed-rxjava3 = "3.1.5"
+managed-rxjava3 = "3.1.6"
 
 micronaut-rxjava2 = "2.0.0-SNAPSHOT"