Merge branch '5.4' into 6.0

* 5.4: (33 commits)
  do not pass a boolean to the constructor of the Dotenv class
  [Notifier] Fix low-deps tests
  Deprecate Composer 1
  [Filesystem] Add third argument `$lockFile` to `Filesystem::appendToFile()`
  [TwigBundle] fix auto-enabling assets/expression/routing/yaml/workflow extensions
  [PhpUnitBridge] fix symlink to bridge in docker by making its path relative
  [Dotenv] Duplicate $_SERVER values in $_ENV if they don't exist
  Fix markup
  [Notifier] Add Expo bridge
  Add polish translations (#43725)
  Rename translation:update to translation:extract
  [String] Add PLURAL_MAP "zombies" -- fix #43789
  Added support for `statusCode` default parameter when loading a template directly from route using the `Symfony\Bundle\FrameworkBundle\Controller\TemplateController` controller.
  [Validator] Update validators.bs.xlf
  Cache voters that will always abstain
  [Messenger] Fix `TraceableMessageBus` implementation so it can compute caller even when used within a callback
  [Validator] Add the missing translations for Russian (ru)
  [Validator] Added missing translations for Latvian (lv)
  [Validator] Added missing translations
  [Validator] Add missing translations for Vietnamese (VI)
  ...

Author: xabbuh

Resources/translations/validators.bs.xlf

@@ -16,7 +16,7 @@
             </trans-unit>
             <trans-unit id="99">
                 <source>This value is not a valid HTML5 color.</source>
-                <target>Ova vrijednost nije ispravna HTML5 boja.</target>
+                <target>Ova vrijednost nije važeća HTML5 boja.</target>
             </trans-unit>
             <trans-unit id="100">
                 <source>Please enter a valid birthdate.</source>