Fix javadoc

Author: slandelle

client/src/main/java/org/asynchttpclient/uri/Uri.java

@@ -135,7 +135,7 @@ public String toUrl() {
     }
 
     /**
-     * @return <scheme>://<hostname>(:<port>). Port is ommitted if it matches the scheme's default one.
+     * @return [scheme]://[hostname](:[port]). Port is ommitted if it matches the scheme's default one.
      */
     public String toBaseUrl() {
         StringBuilder sb = StringUtils.stringBuilder();