fixed typo

Author: FourierTransformer

README.md

@@ -92,7 +92,7 @@ I ran some benchmarks against lua-cjson, rapidjson, and dkjson. For each test, I
 
 I also calculated the throughput for each of the files to show how it may affect real-world performance. You can also find a LuaJIT version in the benchmarks folder
 
-![Lua Throughput Performance Chart](benchamrk/lua-throughput.png)
+![Lua Throughput Performance Chart](benchmark/lua-throughput.png)
 
 All tested files are in the [jsonexamples folder](jsonexamples/).