about: Remove superfluous comma

templates/public/about.html

@@ -26,7 +26,7 @@ <h2 class="title">About Arch Linux</h2>
 <p>
 The minimal Arch base package set resides in the streamlined [core] repository.
 In addition, the official [extra], [community], and [testing] repositories
-provide several thousand high-quality, packages to meet your software demands.
+provide several thousand high-quality packages to meet your software demands.
 Arch also offers the Arch Linux User Repository (AUR), which contains more than
 49,000 build scripts, for compiling installable packages from source using the
 Arch Linux makepkg application.