Update README.md

README.md

@@ -49,7 +49,7 @@ $ cmake .. && make -j
     * syslog.
     * Windows event log.
     * Windows debugger (```OutputDebugString(..)```).
-    * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
+    * Easily extendable with custom log targets  (just implement the simple [sink](include/spdlog/sinks/sink.h) interface).
 * Log filtering - log levels can be modified in runtime as well as in compile time.
 * Support for loading log levels from argv or from environment var.
 * [Backtrace](#backtrace-support) support - store debug messages in a ring buffer and display later on demand.