[feat] Improve paragraph readability

src/website/md.gleam

···
       html.pre([], [html.code([], [element.text(contents)])])
     ast.HtmlBlock(html:) -> html.html([], [element.text(html)])
     ast.Paragraph(contents:) ->
-      html.p([], contents |> list.map(render_inline_node))
+      html.p(
+        [attribute.class("my-2.5")],
+        contents |> list.map(render_inline_node),
+      )
     ast.BlockQuote(contents:) ->
       html.blockquote([], contents |> list.map(render_block_node))
     ast.AlertBlock(level:, contents:) -> {