public/why-gentoo.html: add version mixing point

Signed-off-by: Maciej Barć <xgqt@riseup.net>

README.md

@@ -1,3 +1,5 @@
+# src_prepare.gitlab.io
+
 <p align="center">
     <a href="https://gitlab.com/src_prepare/src_prepare.gitlab.io/pipelines">
         <img src="https://gitlab.com/src_prepare/src_prepare.gitlab.io/badges/master/pipeline.svg">
@@ -20,6 +22,6 @@
 </p>
 
 
-# src_prepare.gitlab.io
+# About
 
 The source code of [src_prepare website](https://src_prepare.gitlab.io)

public/why-gentoo.html

@@ -90,6 +90,19 @@
                     </a>
                     )
                 </li>
+                <li>
+                    Version mixing
+                    (
+                    specific versions of software can be
+                    <a href="https://wiki.gentoo.org/wiki//etc/portage/package.mask">
+                        masked
+                    </a>
+                    or
+                    <a href="https://wiki.gentoo.org/wiki/ACCEPT_KEYWORDS">
+                        "accepted" to use bleeding edge
+                    </a>
+                    )
+                </li>
                 <li>
                     Lack of trust towards binary packages provided by a binary distro
                 </li>