chore: Rename includable templates

templates/sql-injection.html

@@ -1,9 +1,9 @@
 <!DOCTYPE html>
 <html lang="ru">
-    {% include 'head.html' %}
+    {% include '_head.html' %}
 <body>
 
-    {% include 'header.html' %}
+    {% include '_header.html' %}
 
 
     <div class="container">
@@ -20,7 +20,7 @@
         </div>
     </div>
 
-    {% include 'sidenav.html' %}
+    {% include '_sidenav.html' %}
 {% if error %}
     <div id="error">
        <p>{{ error }}</p>