MdeModulePkg: Fix some typos of "according"

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Rebecca Cran <rebecca@bluestop.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: He Junjie <junjie.he@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>

MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c

@@ -1215,7 +1215,7 @@ Dhcp4InstanceConfigUdpIo (
     // UEFI spec, while in classless addressing network, the netmask must be explicitly
     // provided together with the station address.
     // If the DHCP instance haven't be configured with a valid netmask, we could only
-    // compute it accroding to the classful addressing rule.
+    // compute it according to the classful addressing rule.
     //
     Class = NetGetIpClass (ClientAddr);
     ASSERT (Class < IP4_ADDR_CLASSE);