Bump com.squareup.okio:okio from 3.15.0 to 3.16.0 (#2309)

Author: dependabot[bot]

okhttp/pom.xml

@@ -39,7 +39,7 @@
     <dependency>
       <groupId>com.squareup.okio</groupId>
       <artifactId>okio</artifactId>
-      <version>3.15.0</version>
+      <version>3.16.0</version>
     </dependency>
 
     <!-- test dependencies -->