Added Severity and Scoring system at http://127.0.0.1:8000/vulnerabilities/<vulnerability_id>

Signed-off-by: Pushpit <pushpit07@gmail.com>

Author: Pushpit07

vulnerabilities/templates/vulnerability.html

@@ -25,6 +25,7 @@ <h3>References:</h3>
                         <th> Reference ID </th>
                         <th> URL </th>
                         <th> Severity </th>
+                        <th> Scoring System </th>
                     </tr>
                 {% for ref in object_list %}
                 <tr>
@@ -44,6 +45,14 @@ <h3>References:</h3>
 
                 {% endif %}
 
+                {% if ref %}
+                    <td>{{severity.value}}</td>
+
+                {% else %}
+                    <td>-</td>
+
+                {% endif %}
+
                 {% if ref %}
                     <td>{{severity.scoring_system}}</td>