Update Getting Started page with new download options

Revised the desktop app section to clarify macOS availability and added a separate button linking to Windows/Linux installation instructions. Updated button labels for clarity and improved user guidance.

src/pages/GettingStarted.jsx

@@ -320,27 +320,26 @@ export default function GettingStarted() {
                           The desktop app includes everything you need to control your Lite version.
                         </Typography>
                         <Typography variant="caption" sx={{ display: 'block', mb: 2, color: 'warning.main' }}>
-                          🍎 Currently available for macOS only. Windows & Linux coming soon!
-                          <br />
-                          In the meantime, check the{' '}
-                          <Link
-                            href="https://github.com/pollen-robotics/reachy_mini/blob/develop/docs/SDK/readme.md#-installation-of-the-daemon-and-python-sdk"
-                            target="_blank"
-                            rel="noopener noreferrer"
-                            sx={{ color: 'inherit' }}
-                          >
-                            Documentation
-                          </Link>{' '}
-                          to install Reachy Mini software on your machine.
+                          Desktop App currently availables for macOS only. Windows & Linux coming soon!
                         </Typography>
                         <Button
                           variant="contained"
                           component={RouterLink}
                           to="/download"
-                          startIcon={<DownloadIcon />}
+                          startIcon={<DownloadIcon/>}
                         >
-                          Download App
+                          Download MacOS APP
                         </Button>
+
+                        <Button
+                          variant="outlined"
+                          component={RouterLink}
+                          to="https://github.com/pollen-robotics/reachy_mini/blob/develop/docs/SDK/readme.md#-installation-of-the-daemon-and-python-sdk"
+                          startIcon={<OpenInNewIcon/>}
+                        >
+                          Windows/Linux Installation
+                        </Button>
+                        
                       </StepContent>
                     </Step>
                     <Step active completed={false}>