doc/icE1usb: Fix typo

Change-Id: I78fa7a69eed2d0112628396156174a83195f0238
diff --git a/doc/manuals/chapters/hardware.adoc b/doc/manuals/chapters/hardware.adoc
index 4549cf4..bc27616 100644
--- a/doc/manuals/chapters/hardware.adoc
+++ b/doc/manuals/chapters/hardware.adoc
@@ -15,7 +15,7 @@
 As icE1usb is an OSHW (Open Source Hardware) project, the full schematics
 and design files are publicly available.
 
-The design files in KiCAD formwa are available at https://git.osmocom.org/osmo-e1-hardware/tree/hardware/icE1usb
+The design files in KiCAD format are available at https://git.osmocom.org/osmo-e1-hardware/tree/hardware/icE1usb
 
 PDF rendered schematics are available at https://git.osmocom.org/osmo-e1-hardware/plain/hardware/icE1usb/r1.0/icE1usb.pdf