Bump com.squareup.okio:okio from 3.15.0 to 3.16.0 (#2318)

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 -->

pom.xml

@@ -220,7 +220,7 @@
               <link>https://jena.apache.org/documentation/javadoc/jena/</link>
               <link>https://jena.apache.org/documentation/javadoc/arq/</link>
               <link>https://www.antlr.org/api/Java/</link>
-              <link>https://rdf4j.org/javadoc/latest/</link>
+              <link>https://rdf4j.org/javadoc/5.1.0/</link>
               <link>http://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind/</link>
             </links>
             <header>