fix: Replaced call to open with the correct file to open

schedule.go

@@ -67,7 +67,7 @@ func (c CourseConfig) String() string {
 func LoadSchedule(fileName string) (Schedule, error) {
 	var v Schedule
 
-	configFile, err := os.Open("schedule.toml")
+	configFile, err := os.Open(fileName)
 	if err != nil {
 		return v, err
 	}