Fix top margin for responsive design

Author: miri64

community.html

@@ -89,7 +89,7 @@ <h2>Join us</h2>
            </div>
          </div>
 
-         <div class="col-12 col-md-3 mt-5">
+         <div class="col-12 col-md-3 mt-md-5">
            <div class="card border-0 d-flex h-100">
              <div class="card-header d-flex align-items-center justify-content-center h-100 border-0">
                <a href="https://www.hackster.io/riot-os" target="_blank"><img class="card-img-top" src="{{ "assets/img/Hackster_RGB.png" | relative_url }}" alt="Hackster logo"></a>
@@ -101,7 +101,7 @@ <h2>Join us</h2>
            </div>
          </div>
 
-         <div class="col-12 col-md-3 mt-5">
+         <div class="col-12 col-md-3 mt-md-5">
            <div class="card border-0 d-flex h-100">
              <div class="card-header d-flex align-items-center justify-content-center h-100 border-0">
                <a href="https://www.youtube.com/c/RIOT-IoT" target="_blank"><img class="card-img-top" src="{{ "assets/img/yt_logo_rgb_light.png" | relative_url }}" alt="Youtube logo"></a>
@@ -113,7 +113,7 @@ <h2>Join us</h2>
            </div>
          </div>
 
-         <div class="col-12 col-md-3 mt-5">
+         <div class="col-12 col-md-3 mt-md-5">
            <div class="card border-0 d-flex h-100">
              <div class="card-header d-flex align-items-center justify-content-center h-100 border-0">
                <a href="https://makertube.net/c/riot_os" target="_blank"><img class="card-img-top" src="{{ "assets/img/peertube-brand.svg" | relative_url }}" alt="PeerTube logo"></a>