deps: Update dependency io.projectreactor.netty:reactor-netty to v1.1.18 (#1932)

Author: renovate-bot

pom.xml

@@ -229,7 +229,7 @@
       <dependency>
         <groupId>io.projectreactor.netty</groupId>
         <artifactId>reactor-netty</artifactId>
-        <version>1.1.17</version>
+        <version>1.1.18</version>
       </dependency>
       <dependency>
         <groupId>io.netty</groupId>