Update README.md

README.md

@@ -48,7 +48,7 @@ Time needed to log 1,000,000 lines under synchronous mode (in seconds, the best
 #### Asynchronous mode 
 Time needed to log 1,000,000 lines under asynchronous mode, i.e. the time it takes to put them in the async queue (in seconds, the best of 3 runs):
 
-|threads|g2log<sup>async logger</sup>   |spdlog<sup>async mode</sup>|
+|threads|g2log <sup>async logger</sup>   |spdlog <sup>async mode</sup>|
 |:-------|:-----:|-------------------------:|
 |1|       1.850s |0.216s |
 |10|      0.943s  |0.173s|