minor #1252 Fixed another typo in Live Components code block (rrenteria-dev)

This PR was merged into the 2.x branch.

Discussion
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Fixed another typo in Live Components code block

Missing }} after form_start

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Issues        |
| License       | MIT

Commits
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044f82596b Fixed another typo in Live Components code block

Author: weaverryan

doc/index.rst

@@ -1915,7 +1915,7 @@ Inline rendering:
 
     <div {{ attributes }}>
         {{ form_start(form) }}
-            {{ form_row(form.title)
+            {{ form_row(form.title) }}
 
             <h3>Comments:</h3>
             {% for key, commentForm in form.comments %}