frontends: added reference to the macOS/OS X Homebrew project

sane-frontends.html

@@ -255,8 +255,12 @@
 	</ul>
       </li>
       <li>
-	<strong>MacOS X</strong>
+	<strong>macOS and OS X</strong>
 	<ul>
+	  <li>
+	    <a href="https://formulae.brew.sh/formula/sane-backends" target="_top">Homebrew</a>:
+	    This is a build/port of the SANE backends by the Homebrew project.
+	  </li>
 	  <li>
 	    <a href="https://web.archive.org/web/20210807013025/http://www.ellert.se/twain-sane/" target="_top">TWAIN SANE Interface for MacOS X</a>:
 	    This is a TWAIN datasource for MacOS X that aquires images using the SANE backend libraries.