Updating readme to reflect latest program updates

Author: levitation

README.md

@@ -3,10 +3,10 @@
 A tool that detects duplicate files and replaces them with symlinks to a shared file in a special shared files folder.
 
 Usage: 
-<br>`DuplicateFileFinder.exe <minSizeBytes> <directoryToScan> <sharedDirectory> [<hashCacheRoot>] [try-run]`
+<br>`DuplicateFileFinder.exe <minSizeBytes> <directoryToScan> <sharedDirectory> [<hashCacheRoot>] [try-run] [idle-priority]`
 
 Example: 
-<br>`DuplicateFileFinder.exe 1000000 D:\\ D:\\___SharedDuplicates D:\\ try-run`
+<br>`DuplicateFileFinder.exe 1000000 D:\\ D:\\___SharedDuplicates\\ D:\\ try-run idle-priority`
 
 When `hashCacheRoot` argument is omitted then hash cache is disabled.