Update symfony/twig-bridge requirement from ^6.3 to ^6.4

[dependabot]

Updates the requirements on symfony/twig-bridge to permit the latest version.

Release notes

Sourced from symfony/twig-bridge's releases.

v6.4.0

Changelog (symfony/twig-bridge@v6.4.0-RC2...v6.4.0)

• no significant changes

Changelog

Sourced from symfony/twig-bridge's changelog.

CHANGELOG

7.0

• Drop support for Twig 2

6.4

• Allow an array to be passed as the first argument to the importmap() Twig function
• Add TemplatedEmail::locale() to set the locale for the email rendering
• Add AppVariable::getEnabledLocales() to retrieve the enabled locales
• Add impersonation_path() and impersonation_url() Twig functions

6.3

• Add AppVariable::getLocale() to retrieve the current locale when using the LocaleSwitcher

6.2

• Add form_label_content and form_help_content block to form themes
• Add #[Template()] to describe how to render arrays returned by controllers
• Add support for toggle buttons in Bootstrap 5 form theme
• Add app.current_route and app.current_route_parameters variables

6.1

• Wrap help messages on form elements in div instead of p

5.4

• Add github format & autodetection to render errors as annotations when running the Twig linter command in a Github Actions environment.

5.3

• Add a new markAsPublic method on NotificationEmail to change the importance context option to null after creation
• Add a new fragment_uri() helper to generate the URI of a fragment
• Add support of Bootstrap 5 for form theming
• Add a new serialize filter to serialize objects using the Serializer component

5.2.0

... (truncated)

Commits

• 142bc3a [Mime] Add TemplatedEmail::$locale to the serialized props
• bc9a332 Merge branch '6.3' into 6.4
• c514076 Merge branch '5.4' into 6.3
• fc6ee0a Merge branch '4.4' into 5.4
• 83b021c [TwigBridge] Add integration tests on twig code helpers
• 7654da4 [TwigBridge] Ensure CodeExtension's filters properly escape their input
• 6da86c9 [TwigBridge] Fix @internal annotation
• 76b4393 [TwigBridge] Mark CodeExtension as @​internal
• 33438c0 minor #52157 [Tests] Move expectException closer to the place of the expect...
• 0f19287 Fix tests
• Additional commits viewable in compare view

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