Update documentation link

README.md

@@ -2,7 +2,7 @@
 
 - https://www.haproxy.com/doc/aloha/7.0/haproxy/index.html
 - https://cbonte.github.io/haproxy-dconv/index.html
-- https://cbonte.github.io/haproxy-dconv/1.6/configuration.html
+- https://cbonte.github.io/haproxy-dconv/1.7/configuration.html
 
 # Instruction to prepare a certificate file