Fix typo in the code and documentation

Change-Id: I4fa01e4790ba3a50d8a59a5a85e6781bd8f539d1
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/code_update_utils.py b/lib/code_update_utils.py
index 35f9e85..35953c7 100644
--- a/lib/code_update_utils.py
+++ b/lib/code_update_utils.py
@@ -29,7 +29,7 @@
 
     Description of argument(s):
     image_type                     This value is either BMC update or Host update type.
-    sw_dict                        This contain dictionay of firmware inventory properties.
+    sw_dict                        This contain dictionary of firmware inventory properties.
     """
 
     temp_dict = collections.OrderedDict()