docs: Tidy up whitespace in Urgency.md table

Author: claremacrae

docs/Advanced/Urgency.md

@@ -62,7 +62,7 @@ The scores are as follows:
     <td>Highest</td>
     <td><code>9.0</code></td>
   </tr>
-    <tr>
+  <tr>
     <td>High</td>
     <td><code>6.0</code></td>
   </tr>
@@ -78,7 +78,7 @@ The scores are as follows:
     <td>Low</td>
     <td><code>0.0</code></td>
   </tr>
-    <tr>
+  <tr>
     <td>Lowest</td>
     <td><code>-1.8</code></td>
   </tr>