minor #18525 Revamp the kernel configuration reference (javiereguiluz)

This PR was squashed before being merged into the 6.2 branch.

Discussion
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Revamp the kernel configuration reference

Fixes #14455 and #17935.

Commits
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64c2122 Revamp the kernel configuration reference

Author: javiereguiluz

reference/configuration/framework.rst

@@ -24,6 +24,8 @@ configured under the ``framework`` key in your application configuration.
 Configuration
 -------------
 
+.. _configuration-framework-secret:
+
 secret
 ~~~~~~
 
@@ -479,6 +481,8 @@ If ``true``, Symfony adds a ``X-Robots-Tag: noindex`` HTTP tag to all responses
 This option is a protection measure in case you accidentally publish your site
 in debug mode.
 
+.. _configuration-framework-trusted-hosts:
+
 trusted_hosts
 ~~~~~~~~~~~~~