Update README.md (denji#4)

just move `~~`

README.md

@@ -34,7 +34,7 @@ HTTP(S) Benchmark Tools
 * [__tsung__](http://tsung.erlang-projects.org/) – Simulate stress users in order to test the scalability and performance of IP based client/server applications `HTTP`, `WebDAV`, `SOAP`, `PostgreSQL`, `MySQL`, `LDAP` and `Jabber`/`XMPP` servers, written in `Erlang`
 * [__vegeta__](https://github.com/tsenart/vegeta) – HTTP load testing tool and library, written in Go (`golang`)
 * [__weighttp__](https://github.com/lighttpd/weighttp) – multithreaded, but slower than htstress without keepalive, written in `C`
-* [__wrk__](https://github.com/wg/wrk) – multithreaded~~, but doesn't offer concurrent connections and a keepalive switch~~, written in `C`/`Lua`
+* [__wrk__](https://github.com/wg/wrk) – multithreaded, ~~but doesn't offer concurrent connections and a keepalive switch~~, written in `C`/`Lua`
 * [__wrk2__](https://github.com/giltene/wrk2) – constant throughput, correct latency recording variant of wrk, written in `C`/`Lua`
 
         Concurrent connections are enabled with: