correct typo (#11)

Author: ifedapoolarewaju

README.md

@@ -3,7 +3,7 @@
 > **tus** is a protocol based on HTTP for *resumable file uploads*. Resumable
 > means that an upload can be interrupted at any moment and can be resumed without
 > re-uploading the previous data again. An interruption may happen willingly, if
-> the user wants to pause, or by accident in case of an network issue or server
+> the user wants to pause, or by accident in case of a network issue or server
 > outage.
 
 **tus-java-client** is a library for uploading files using the *tus* protocol to any remote server supporting it.