Modify readme based on the display change

docs/api-site-config.md

@@ -121,7 +121,7 @@ An option to disable showing the tagline in the title of main pages. Exclude thi
 URL for editing docs, usage example: `editUrl + 'en/doc1.md'`. If this field is omitted, there will be no "Edit this Doc" button for each document.
 
 #### `enableUpdateTime` [string]
-An option to enable the docs showing last update time. Set to `true` to show a line at the bottom right corner of each doc page as `Last Updated: dd/mm/yyyy hh:MM:ss Z`.
+An option to enable the docs showing last update time. Set to `true` to show a line at the bottom right corner of each doc page as `Last updated on dd/mm/yyyy hh:MM:ss`.
 
 #### `facebookAppId` [string]
 If you want Facebook Like/Share buttons in the footer and at the bottom of your blog posts, provide a [Facebook application id](https://www.facebook.com/help/audiencenetwork/804209223039296).
@@ -136,7 +136,7 @@ Set this to `true` if you want to enable Facebook comments at the bottom of your
 Font-family CSS configuration for the site. If a font family is specified in `siteConfig.js` as `$myFont`, then adding a `myFont` key to an array in `fonts` will allow you to configure the font. Items appearing earlier in the array will take priority of later elements, so ordering of the fonts matter.
 
 #### `enableUpdateBy` [boolean]
-An option to enable the docs showing last update time. Set to `true` to show a line at the bottom right corner of each doc page as `Last Updated By: <Author Name>`.
+An option to enable the docs showing last update time. Set to `true` to show a line at the bottom right corner of each doc page as `Last updated by <Author Name>`.
 
 In the below example, we have two sets of font configurations, `myFont` and `myOtherFont`. `Times New Roman` is the preferred font in `myFont`. `-apple-system` is the preferred in `myOtherFont`.