Snapshot: bump MATLAB requirement to R2018b

_includes/download-snapshot.html

@@ -17,7 +17,7 @@
 
   <section class="dynare_section" id="snapshot_content1">
     <p>
-      Compatible with Windows (10 and 11), MATLAB (R2014a–R2023b) and
+      Compatible with Windows (10 and 11), MATLAB (R2018b–R2023b) and
       GNU Octave
       (<a href="https://ftp.gnu.org/gnu/octave/windows/octave-8.4.0-w64-installer.exe">8.4.0</a>
       only), 64-bit
@@ -42,7 +42,7 @@
   <section class="dynare_section" id="snapshot_content2">
     <p>
       Compatible with macOS 14 “Sonoma” (Apple Silicon arm64 or Intel x86-64)
-      and MATLAB (R2014a–R2023b). <b>NB</b>: This package is
+      and MATLAB (R2018b–R2023b). <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. No snapshot is available for Octave here. You can
       compile from source or take the latest snapshot