Improve style of sub title (#2652)

apps/client/src/app/pages/blog/blog-page.html

@@ -1,7 +1,7 @@
 <div class="container">
   <div class="mb-5 row">
     <div class="col">
-      <h1 class="h3 mb-4 text-center">
+      <h1 class="h3 line-height-1 mb-4 text-center">
         <span class="d-none d-sm-block" i18n>Blog</span>
         <small class="text-muted" i18n
           >Discover the latest Ghostfolio updates and insights on personal

apps/client/src/app/pages/features/features-page.html

@@ -1,7 +1,7 @@
 <div class="container">
   <div class="row">
     <div class="col">
-      <h1 class="h3 mb-4 text-center">
+      <h1 class="h3 line-height-1 mb-4 text-center">
         <span class="d-none d-sm-block" i18n>Features</span>
         <small class="text-muted" i18n>
           Check out the numerous features of Ghostfolio to manage your wealth