fix: change unmatched html tags, remove redundant 'px' from 0

- i think the author's intention was to use an h3 tag
- 'px' (or any) unit is not needed when specifying `margin: 0;`

Author: activedecay

examples/soap-calculator/public/index.html

@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-soap-calculator</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">

examples/todo-list/public/index.html

@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-todo-list</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">

examples/todo/public/index.html

@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0
     }
 
     .info p {
@@ -58,8 +58,8 @@
   <div class="info">
     <h1>@loopback/example-todo</h1>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">

packages/cli/generators/app/templates/public/index.html.ejs

@@ -43,7 +43,7 @@
 
     .info h1 {
       text-align: center;
-      margin-bottom: 0px;
+      margin-bottom: 0;
     }
 
     .info p {
@@ -59,8 +59,8 @@
     <h1><%= project.name %></h1>
     <p>Version <%= project.version || '1.0.0' %></p>
 
-    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h4>
-    <h3>API Explorer: <a href="/explorer">/explorer</a></h4>
+    <h3>OpenAPI spec: <a href="/openapi.json">/openapi.json</a></h3>
+    <h3>API Explorer: <a href="/explorer">/explorer</a></h3>
   </div>
 
   <footer class="power">