Update README.md

Author: Tallguy297

README.md

@@ -1,7 +1,7 @@
 # SimpleHTTPServerWithUpload
 Simple HTTP Server With Upload written in Python.<br>
 This script works with version 3.6.<br>
-Earlier versions will causing runtime errors.<br><br>
+Earlier versions will cause runtime errors.<br><br>
 This is a modified version from the original source.<br>
 https://gist.github.com/UniIsland/3346170<br><br>
 I have added icons for directory and videos.<br>