chore(deps): update dependency io.projectreactor:reactor-test to v3.7.9

Author: renovate[bot]

topics/testing/code/pom.xml

@@ -104,7 +104,7 @@
             <groupId>io.projectreactor</groupId>
             <artifactId>reactor-test</artifactId>
             <scope>test</scope>
-            <version>3.7.8</version>
+            <version>3.7.9</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>