Fix bug.

modules/gallery/gallery_index1.html.erb

@@ -1,7 +1,7 @@
 <div class="index-gallery index1">
-  <h1 class="index-title">
+  <h3 class="index-title">
     <span>{{page-title}}</span>
-  </h1>
+  </h3>
   <div class="row" data-level="0" data-list="albums" style="display: flex;flex-wrap: wrap;">
     <div class="index-content col-xs-4 col-sm-3">
       <div class="index-content-inner">

modules/gallery/gallery_index2.html.erb

@@ -1,7 +1,7 @@
 <div class="index-gallery index2">
-  <h1 class="index-title">
+  <h3 class="index-title">
     <span>{{page-title}}</span>
-  </h1>
+  </h3>
   <div class="row" data-level="0" data-list="albums" style="display: flex;flex-wrap: wrap;">
     <div class="index-content">
       <div class="index-content-inner clearfix row">

modules/gallery/gallery_index3.html.erb

@@ -1,7 +1,7 @@
 <div class="index-gallery index1">
-  <h1 class="index-title">
+  <h3 class="index-title">
     <span>{{page-title}}</span>
-  </h1>
+  </h3>
   <div class="row" data-level="0" data-list="albums" style="display: flex;flex-wrap: wrap;">
     <div class="index-content col-xs-4 col-sm-3">
       <div class="index-content-inner">

modules/gallery/gallery_index4.html.erb

@@ -1,7 +1,7 @@
 <div class="index-gallery index2">
-  <h1 class="index-title">
+  <h3 class="index-title">
     <span>{{page-title}}</span>
-  </h1>
+  </h3>
   <div class="row" data-level="0" data-list="albums" style="display: flex;flex-wrap: wrap;">
     <div class="index-content">
       <div class="index-content-inner clearfix row">

modules/gallery/gallery_index5.html.erb

@@ -1,7 +1,7 @@
 <div class="index-gallery gallery card-group index5">
-  <h1 class="index-title">
+  <h3 class="index-title">
     <span>{{page-title}}</span>
-  </h1>
+  </h3>
   <link rel="stylesheet" type="text/css" href="/assets/gallery_card.css">
   <div class="row" data-level="0" data-list="albums">
     <div class="card card-flip h-100">