This PR was squashed before being merged into the 6.2 branch.Discussion----------Update setup.rst ( version 6.2 )Commits-------b7438ff Update setup.rst ( version 6.2 )

* 6.1:  Fix: Use correct SF version

* 6.1:  [HtmlSanitizer] Fix wrong method name

* 6.1:  Add the versionadded directive  Add information about DateTimeValueResolver

* 6.1:  Fix options path in composer.json

* 6.1:  [Frontend] Remove an unused reference

…aviereguiluz)This PR was merged into the 6.2 branch.Discussion----------[Security] Move the Security helper to SecurityBundleFixes#16846.Commits-------c7369d5 [Security][SecurityBundle] Move the Security helper to SecurityBundle

* 6.1:  Fix second twig path reference to be consistent with the first reference on security documentation

* 6.1:  [HtmlSanitizer] Fix a few typos in the introduction

* 6.1:  Remove the deprecated SetUpTearDownTrait feature  [PhpUnitBridge] Mention the SetUpTearDownTrait deprecation

* 6.1:  Add assets to the documentation  add caution to URL-encode special characters in Notifier DSNs  [Form][NumberType] Fix constants  Fix development testing examples

* 6.1:  [Validator] Update validation.rst

This PR was squashed before being merged into the 6.2 branch.Discussion----------[Security] Enforce maximum username lengthFixes#16856.Commits-------0e14ecf [Security] Enforce maximum username length

* 6.1:  [Notifier] Added the Engagespot push notification

* 6.1:  Update questionhelper.rst  Reword  hint about creating config/routes/annotations.yaml as well, when using attributes without doctrine/annotations.

* 6.1:  [Doctrine] Add attribute example for Lifecycle Callbacks

* 6.1:  Use HTML syntax highlighting  Update http_kernel_httpkernelinterface.rst

* 6.1:  [Translation] Update locale.rst

* 6.1:  Remove deprecated Docs ind "lock"

* 6.1:  [Frontend] Update UX package list  New features must go on the 6.x branch

…(fabpot)This PR was merged into the 6.2 branch.Discussion----------[Mailer] Add more information about sending email asyncThe example only works as of 6.2 thanks tosymfony/symfony#47075I've written this PR because we keep having issues likesymfony/symfony#44439.So, documenting a bit more how it works internally might help people understand what to do.Commits-------4fbbc16 Add more information about sending email async

* 6.1:  [Routing] Fix some internal references links  Add links to each Symfony UX component demo  Linking to ux.symfony.com

* 6.1:  [Messenger] fix broken link to Validator component

* 6.1:  Update mercure.rst  [HttpKernel] Add UidValueResolver to the list of built-in value resolvers  Adding missing `use`s

* 6.1:  Be more detailed about coding standards for PHPdoc

* 6.1:  Update README.markdown

* 6.1:  Adding class constants

* 6.1:  [ExpressionLanguage] Feature Null-coalescing operator

* 6.1:  fix reference markup

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