Fix fonts in Search.astro

In `Search.astro`, a CSS variable `--pagefind-ui-font: var(--font-body)`
is used to control the font within the Pagefind search component, but
there are some other elements in `Search.astro` that are not using the
same font. This commit will update the CSS in `Search.astro` so the font
matches throughout the component.

src/components/Search.astro

@@ -159,6 +159,7 @@ const labels = {
   }
 
   button {
+    font-family: var(--font-body);
     margin: 0 0.5rem;
   }
 
@@ -212,6 +213,7 @@ const labels = {
 
   dialog {
     margin: 0;
+    font-family: var(--font-body);
     background-color: var(--gray-800);
     border: 1px solid var(--gray-700);
     width: 100%;