Credits: Fix Footer under the globe

Added a z-index on the main (now with a class for specificity) to go over the canvas

src/style/pages/_page.scss

@@ -95,4 +95,12 @@
             margin-top: 136px;
         }
     }
-}
+
+
+    /*
+    ** Credit page
+    */
+    &--credits {
+        z-index: 120;
+    }
+}