doc - Corrected the extension for archived docs

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The file extension has been changed to zip from rar a long time ago, so we've decided to adjust to this change.

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Type: doc
Breaking: False
Doc Required: False
Backport Required: False
Part: 1/1

DocGen/index.md

@@ -6,7 +6,7 @@ VisualCard is a library that parses the contact files created by Outlook or othe
 
 This webpage is an API documentation for mod developers to be used as reference. It constantly gets updated as we push the updates to the main and servicing versions of this project.
 
-If you still intend to use a documentation specific to your preferred version of VisualCard, you may refer to the [releases](https://github.com/Aptivi/VisualCard/releases) page of the project and download the attached `<version>-doc.rar` file.
+If you still intend to use a documentation specific to your preferred version of VisualCard, you may refer to the [releases](https://github.com/Aptivi/VisualCard/releases) page of the project and download the attached `<version>-doc.zip` file.
 
 To get started using the documentation, select `API Documentation` from the top menu and select a namespace to get a clear overview of the API.