typo

README.md

@@ -2,7 +2,7 @@
 
 ![Hardware Chart](hardware/windkanal.png)
 
-# [Bestellliste](harrdware/bom.xlsx)
+# [Bestellliste](hardware/pcb/bom.xlsx)
 
 # [PCB](https://easyeda.com/User201/windkanal)
 [Gerber Dateien](hardware/pcb)