fix docker home path on windows

daemon_win.go

@@ -4,7 +4,7 @@ package docker
 
 const dockerExe = "C:\\bin\\docker.exe"
 const dockerdExe = ""
-const dockerHome = "C:\\ProgramData\\docker\"
+const dockerHome = "C:\\ProgramData\\docker\\"
 
 func (p Plugin) startDaemon() {
 	// this is a no-op on windows