minor #16807 Fix options path in composer.json (l-vo)

This PR was merged into the 5.4 branch.

Discussion
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Fix options path in composer.json

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Commits
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05cf436 Fix options path in composer.json

Author: javiereguiluz

components/runtime.rst

@@ -314,7 +314,7 @@ can be set using the ``APP_RUNTIME_OPTIONS`` environment variable::
 
     // ...
 
-You can also configure ``extra.runtime.options`` in ``composer.json``:
+You can also configure ``extra.runtime`` in ``composer.json``:
 
 .. code-block:: json