[D-I Manual] typos in arm.xml

[philippe.batailler@free.fr (Philippe Batailler)]

Hello,

There are two typos in manual/en/install-methods/download/arm.xml :

@@ -52,7 +52,7 @@
 <para>
 
 The GLAN Tank requires a kernel and ramdisk on an ext2 partition on the
-disk on with you intend to install Debian.  These images can be obtained
+disk on which you intend to install Debian.  These images can be obtained
 from &glantank-firmware-img;.
 
 </para>
@@ -63,7 +63,7 @@
 <para>
 
 The Kurobox Pro requires a kernel and ramdisk on an ext2 partition on the
-disk on with you intend to install Debian.  These images can be obtained
+disk on which you intend to install Debian.  These images can be obtained
 from &kuroboxpro-firmware-img;.
 
Regards,
-- 
Philippe Batailler