re-add missing end code block quote

Adimote · Adimote · commit fb245a5a115e · 2021-08-15T12:45:17.000+02:00
diff --git a/content/api/magnet.md b/content/api/magnet.md
@@ -33,3 +33,4 @@ The magnet can tell you if there is an object in range to be picked up. You can
 ```python
 # Is there a container nearby?
 is_nearby = r.magnet.nearby() # True or False
+```
