renamed 'Varnish HTTP Cache' to 'Varnish Cache'

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -512,7 +512,7 @@ Linux Security Expert</b></a> - trainings, howtos, checklists, security tools an
 ##### :black_small_square: HTTP(s) Services
 
 <p>
-&nbsp;&nbsp;:small_orange_diamond: <a href="https://varnish-cache.org/"><b>Varnish HTTP Cache</b></a> - HTTP accelerator designed for content-heavy dynamic web sites.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://varnish-cache.org/"><b>Varnish Cache</b></a> - HTTP accelerator designed for content-heavy dynamic web sites.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://nginx.org/"><b>Nginx</b></a> - open source web and reverse proxy server that is similar to Apache, but very light weight.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.haproxy.org/"><b>HAProxy</b></a> - the reliable, high performance TCP/HTTP load balancer.<br>
 </p>