net: doc: fix spelling mistake: "modrobe.d" -> "modprobe.d"

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/bonding.txt

@@ -140,7 +140,7 @@ bonding module at load time, or are specified via sysfs.
 
 	Module options may be given as command line arguments to the
 insmod or modprobe command, but are usually specified in either the
-/etc/modrobe.d/*.conf configuration files, or in a distro-specific
+/etc/modprobe.d/*.conf configuration files, or in a distro-specific
 configuration file (some of which are detailed in the next section).
 
 	Details on bonding support for sysfs is provided in the