Skatepark: Add footer pattern to footer template (#5088)

skatepark/block-template-parts/footer.html

@@ -1,3 +1,5 @@
+<!-- wp:pattern {"slug":"skatepark/pre-footer"} /-->
+
 <!-- wp:group {"className":"site-footer","style":{"spacing":{"padding":{"bottom":"30px"}}}} -->
 <div class="wp-block-group site-footer" style="padding-bottom: 30px">