docs: add releases to home page (#93)

Reference Releases page from how-to download kernel source page

Signed-off-by: annecyh <[email protected]>

Author: AnneCYH

docs/how-to/download-real-time-sources.rst

@@ -5,6 +5,8 @@ The source code for Ubuntu's real-time kernel is available for download.
 The following guide will show you how to download it for your system's release of Ubuntu.
 The process depends on the release of Ubuntu you are using.
 
+See :doc:`/reference/releases` for more information.
+
 Enable access to the real-time Ubuntu kernel
 ---------------------------------------------
 

docs/index.md

@@ -100,6 +100,7 @@ If you decide to raise a pull request, make sure you have signed the
 /how-to/index
 /reference/index
 /explanation/index
+/reference/releases
 ```
 
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