privacytools.io sponsorships (#1451)

* Add sponsorship sections and information

* Correct typographical error

* Minor adjustments

_includes/footer.html

@@ -61,8 +61,8 @@
     </div>
 
     <div class="col-sm-4 mb-3 d-flex justify-content-center">
-      <i class="fas fa-heart fa-2x text-danger"></i>
-      <a data-toggle="tooltip" data-placement="top" data-original-title="Please support this project by donating. We are ad free and not affiliated with any providers. Your donation will cover our cost for server and domain." href="/donate/">Donate</a>
+      <i class="fas fa-donate fa-2x"></i>
+      <a data-toggle="tooltip" data-placement="top" data-original-title="Please support this project by donating. We are ad free and not affiliated with any providers. Your donation will cover our cost for server and domain." href="https://opencollective.com/privacytoolsio#section-contribute">Support Us!</a>
     </div>
   </div>
 

_includes/nav.html

@@ -142,8 +142,8 @@
         </details>
 
         <a href="https://blog.privacytools.io/" class="nav-anchor">Blog </a>
-        <a href="/donate/" class="nav-anchor">
-          Donate <span class="fas fa-heart text-danger fa-fw"></span>
+        <a href="/sponsors/" class="nav-anchor">
+          Sponsors
         </a>
         <span id="nav-switch-theme" class="nav-anchor">
           Theme <span class="nav-theme-icon fas fa-fw"></span>