Typo fix

Author: hsychla

README.md

@@ -1,6 +1,6 @@
 # TSHARK in a container
 
-This container starts a tshark and safes the captured packages in files. IT 
+This container starts a tshark and safes the captured packages in files. It 
 uses a ring buffer with a default file size of 1 Gigabyte and a maximum number 
 of files of 10. All files are stored in the `/data` directory.