minor #19579 Fix the toctree syntax of some content (javiereguiluz)

This PR was merged into the 6.4 branch.

Discussion
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Fix the toctree syntax of some content

This tries to fix the missing Prev/Next link in the "Create your own framework" docs.

See symfony-tools/docs-builder#164 (comment)

Commits
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f968ab2 Fix the toctree syntax of some content

Author: javiereguiluz

index.rst

@@ -85,4 +85,7 @@ Create your Own Framework
 
 Want to create your own framework based on Symfony?
 
-.. include:: /create_framework/map.rst.inc
+.. toctree::
+   :maxdepth: 2
+
+   create_framework/index