fix: only one h1 on a page (closes #1269)

Author: jackyzha0

quartz/components/Explorer.tsx

@@ -92,7 +92,7 @@ export default ((userOpts?: Partial<Options>) => {
           data-savestate={opts.useSavedState}
           data-tree={jsonTree}
         >
-          <h1>{opts.title ?? i18n(cfg.locale).components.explorer.title}</h1>
+          <h2>{opts.title ?? i18n(cfg.locale).components.explorer.title}</h2>
           <svg
             xmlns="http://www.w3.org/2000/svg"
             width="14"

quartz/components/PageTitle.tsx

@@ -9,16 +9,17 @@ const PageTitle: QuartzComponent = ({ fileData, cfg, displayClass }: QuartzCompo
   const baseDir = pathToRoot(fileData.slug!)
   const iconPath = joinSegments(baseDir, "static/Logo.png")
   return (
-    <h1 class={classNames(displayClass, "page-title")}>
+    <h2 class={classNames(displayClass, "page-title")}>
       <a href={baseDir}>
         <img class="Logo" src={iconPath} alt={title}/>
       </a>
-    </h1>
+    </h2>
   )
 }
 
 PageTitle.css = `
 .page-title {
+  font-size: 1.75rem;
   margin: 0;
 }
 .Logo {

quartz/components/styles/explorer.scss

@@ -11,7 +11,7 @@ button#explorer {
   display: flex;
   align-items: center;
 
-  & h1 {
+  & h2 {
     font-size: 1rem;
     display: inline-block;
     margin: 0;