Docs: delete an incorrect closing html tag and empty block code (#16194)

examples/docs/en-US/page-header.md

@@ -18,7 +18,7 @@ If path of the page is simple, it is recommended to use PageHeader instead of th
     }
   }
 </script>
-```html
+```
 :::
 
 ### Attributes

examples/docs/es/page-header.md

@@ -37,7 +37,3 @@ Si la ruta de la página es simple, se recomienda utilizar  PageHeader en lugar
 | --------------- | ----------- |
 | title           | titulo      |
 | content         | contenido   |
-
-```
-
-```

examples/docs/fr-FR/page-header.md

@@ -18,7 +18,7 @@ If path of the page is simple, it is recommended to use PageHeader instead of th
     }
   }
 </script>
-```html
+```
 :::
 
 ### Attributes