docs: fix sandbox URL (#1303)

The sandbox has moved to a new URL some time ago; replace occurrences
with the new URL.

Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>

docs/content/gettingstarted.md

@@ -7,7 +7,7 @@ weight: 20
 
 We offer a sandbox installation that is free for everyone to try out hawkBit's [Management UI](/hawkbit/ui/),
 [Management API](/hawkbit/apis/management_api/), and [Direct Device Integration API](/hawkbit/apis/ddi_api/):  
-**[<i class="fas fa-desktop">&nbsp;</i> https://hawkbit.eclipse.org](https://hawkbit.eclipse.org)**
+**[<i class="fas fa-desktop">&nbsp;</i> https://hawkbit.eclipseprojects.io](https://hawkbit.eclipseprojects.io)**
 
 {{% warning %}}
 The sandbox is a shared installation that will be reset from time to time. Therefore, it is not allowed to upload

docs/content/sandbox.md

@@ -1,4 +1,4 @@
 ---
 title: Sandbox
-redirectURL: https://hawkbit.eclipse.org
+redirectURL: https://hawkbit.eclipseprojects.io
 ---

docs/layouts/partials/drawer.html

@@ -21,7 +21,7 @@
       {{ if (eq (trim .Site.Params.provider " " | lower) "github") | and (isset .Site.Params "repo_url") }}
         <ul class="repo">
           <li class="repo-download">
-            <a href="https://hawkbit.eclipse.org" target="_blank" title="hawkBit Sandbox" data-action="sandbox">
+            <a href="https://hawkbit.eclipseprojects.io" target="_blank" title="hawkBit Sandbox" data-action="sandbox">
               <i class="fas fa-desktop"></i> &nbsp; Sandbox
             </a>
           </li>

docs/static/slides/community-day-2018.html

@@ -106,7 +106,7 @@
                 <ul style="position:absolute; left:2em;">
                     <li style="margin-bottom: 0.5em"><a href="https://search.maven.org/search?q=g:org.eclipse.hawkbit%20AND%20v:0.2.0">First
                             Release<a></li>
-                    <li style="margin-bottom: 0.5em"><a href="https://hawkbit.eclipse.org">New sandbox</a></li>
+                    <li style="margin-bottom: 0.5em"><a href="https://hawkbit.eclipseprojects.io">New sandbox</a></li>
                     <li style="margin-bottom: 0.5em"><a href="https://www.eclipse.org/hawkbit">New homepage</a></li>
                     <li style="margin-bottom: 0.5em">Circle CI 2.0 (incl. <a href="https://github.com/eclipse/hawkbit-examples">examples</a>
                         & <a href="https://github.com/eclipse/hawkbit-extensions">extensions</a>)</li>