docs: Add closing paragraph tag

Minor change that only improves xpath parsing.

packages/node_modules/@node-red/nodes/locales/en-US/sequence/17-split.html

@@ -103,7 +103,7 @@ <h3>Details</h3>
     <h4>Automatic mode</h4>
     <p>Automatic mode uses the <code>parts</code> property of incoming messages to
        determine how the sequence should be joined. This allows it to automatically
-       reverse the action of a <b>split</b> node.
+       reverse the action of a <b>split</b> node.</p>
 
     <h4>Manual mode</h4>
     <p>When configured to join in manual mode, the node is able to join sequences