Update README.md

README.md

@@ -19,9 +19,9 @@ After testing, I found that the application operates best with audio files under
 
 # Estimated times
 
-- 5 min file -> 80 to 90 seconds
-- 10 min file -> 190 seconds to 230 seconds
-- 15 min file -> 350 seconds to 400 seconds
+- **5 min file**: 80 to 90 seconds
+- **10 min file**: 190 seconds to 230 seconds
+- **15 min file**: 350 seconds to 400 seconds
   
 # Main Use