Update sample and notes

Signed-off-by: Chin Yeung Li <[email protected]>

Author: chinyeungli

example/e2fsprogs-1.39/input/MAPPING.CONFIG

@@ -14,20 +14,18 @@
 # <about_tool key>: <input key>
 #
 # Example:
-#   Assuming your input have columns "Resource", "Component", "Confirmed Version", "Confirmed Copyright", "Confirmed License"
-#   One should do:
+#   Assuming your input have columns "Resource", "Component" and wanted to convert "Resource" to "about_resource"
+#   and "Component" to "name"
 #
-#   about_file_path: Resource
+#   about_resource: Resource
 #   name: Component
 #
-# In addition, if there are fields that you want to put in the ABOUT
-# files, please use the 'Custom Fields' to include these fields.
 #
-#   Note: All the Custom Field's keys will be converted to lower case and 
-#         all the spaces will be replaced by '_'
+#   Note: All the Custom Field's keys will be converted to lower case and
+#         no spaces is allowed for the key's name.
 #
 #
-#   See http://www.dejacode.org/about_spec_v0.8.1.html for more information
+#   See https://aboutcode.readthedocs.io/projects/aboutcode-toolkit/ for more information
 #
 
 # Essential Fields