update snapshot description for macOS + Octave

_includes/download-snapshot.html

@@ -39,10 +39,10 @@
   <section class="dynare_section" id="snapshot_content2">
     <p>
       Compatible with macOS (10.11 and later, earlier versions may work but
-      have not been tested), any 64-bit MATLAB, and Octave (5.1.0 installed
-      via <a href="https://brew.sh/">Homebrew</a>). <b>NB</b>: This package is
-      unsigned; to run it, you need to right click on it and select "Open" from
-      the menu that pops up.
+      have not been tested), any 64-bit MATLAB, and Octave (4.4.1 installed
+      via <a href="https://octave-app.org">https://octave-app.org</a>). <b>NB</b>:
+      This package is unsigned; to run it, you need to right click on it and
+      select "Open" from the menu that pops up.
     </p>
     <div class="download_table">
       {% include snapshot/download-snapshot-macos.html %}