Add redirection to f-droid on download button

en/index.html

@@ -100,7 +100,7 @@
         </div>
 
         <div class="hero-third-block">
-          <a class="download-btn" href="https://f-droid.org/en/packages/pro.kherel.selfprivacy/">Get it on F-Droid</a>
+          <a class="download-btn" href="https://f-droid.org/en/packages/pro.kherel.selfprivacy/">Download</a>
           <a class="download-btn color-grey" href="second.html">Detailed manual</a>
           <p class="paragraph"><a class="git-link" href="https://git.selfprivacy.org">Project source in the
               git-repo<br />git.selfprivacy.org</a></p>

index.html

@@ -104,7 +104,7 @@
         </div>
 
         <div class="hero-third-block">
-          <a class="download-btn" href="https://f-droid.org/en/packages/pro.kherel.selfprivacy/">Скачать из F-Droid (Alpha)</a>
+          <a class="download-btn" href="https://f-droid.org/en/packages/pro.kherel.selfprivacy/">Скачать</a>
           <a class="download-btn color-grey" href="second.html">Подробная инструкция</a>
           <p class="paragraph"><a class="git-link" href="https://git.selfprivacy.org">Исходный код<br/>git.selfprivacy.org</a></p>
         </div>