fix chapter block

assets/sass/_theme/blocks/chapter.sass

@@ -15,7 +15,7 @@
         display: flex
         .text
             order: 2
-        figcaption
+        figure
             margin-bottom: $spacing1
     &--alt_background
         background: $block-chapter-layout-alt-background
@@ -41,8 +41,8 @@
                 background: none
                 .chapter .text
                     padding: $grid-gutter col(1, 8)
-            figcaption
-                padding: 0 col(1, 8)
+                figcaption
+                    padding: 0 col(1, 8)
             &--alt_background
                 .chapter
                     background: $block-chapter-layout-alt-background