css: fix projects padding

Signed-off-by: Yvan Volochine <[email protected]>

Author: gusano

projects.md

@@ -4,9 +4,9 @@ title : Projects
 bootstrap: true
 ---
 
-<div class="row">
+<div class="row mt-4">
 {% for item in site.data.gallery %}
-  <div class="col-md-6 mb-4">
+  <div class="col-md-6 mb-5">
     {% include gallery_card.md %}
   </div>
   {% endfor %}