Show extra build loading skeleton

Change to the layout made it so that three often looks weird.

components/builds/BuildsSkeleton.tsx

@@ -26,6 +26,14 @@ const BuildsSkeleton = () => (
       p="20px"
       m={2}
     />
+    <Skeleton
+      w="300px"
+      height="500px"
+      rounded="lg"
+      boxShadow="md"
+      p="20px"
+      m={2}
+    />
   </Flex>
 );