Shorten the EPUB option's note to "Most Readers"

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

site/index.html

@@ -56,7 +56,7 @@
             </div>
             <fieldset class="formats">
               <legend>Format</legend>
-              <label><input type="radio" name="format" value="epub" checked> EPUB <span>reMarkable and most readers</span></label>
+              <label><input type="radio" name="format" value="epub" checked> EPUB <span>Most Readers</span></label>
               <label><input type="radio" name="format" value="kepub"> KEPUB <span>Kobo</span></label>
               <label><input type="radio" name="format" value="both"> Both</label>
             </fieldset>