fix: incorrect heading sizes article page and page (#322)

Author: melniiv

apps/events-helsinki/src/pages/articles/[...slug].tsx

@@ -63,6 +63,7 @@ const NextCmsArticle: NextPage<{
   return (
     <MatomoWrapper>
       <RHHCPage
+        className="article-page"
         navigation={<Navigation page={article} />}
         content={
           <RHHCPageContent

apps/hobbies-helsinki/src/pages/articles/[...slug].tsx

@@ -61,6 +61,7 @@ const NextCmsArticle: NextPage<{
   return (
     <MatomoWrapper>
       <RHHCPage
+        className="article-page"
         navigation={<Navigation page={article} />}
         content={
           <RHHCPageContent

apps/hobbies-helsinki/src/pages/pages/[...slug].tsx

@@ -57,6 +57,7 @@ const NextCmsPage: NextPage<{
   return (
     <MatomoWrapper>
       <HCRCPage
+        className="page"
         navigation={<Navigation page={page} />}
         content={
           <HCRCPageContent