Updated README to mention the new WordPress version

Author: TrafeX

README.md

@@ -2,7 +2,7 @@
 
 Lightweight WordPress container with Nginx 1.10 & PHP-FPM 7.1 based on Alpine Linux.
 
-_WordPress version currently installed:_ **4.7.4**
+_WordPress version currently installed:_ **4.7.5**
 
 * Used in production for my own sites, making it stable, tested and up-to-date
 * Optimized for 100 concurrent users