minor #21678 [Yaml] fix DUMP_EMPTY_ARRAY_AS_SEQUENCE flag value (xabbuh)
minor #21678 [Yaml] fix DUMP_EMPTY_ARRAY_AS_SEQUENCE flag value (xabbuh)

This PR was merged into the 3.3-dev branch.

Discussion
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[Yaml] fix DUMP_EMPTY_ARRAY_AS_SEQUENCE flag value

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

3953d76954 fix DUMP_EMPTY_ARRAY_AS_SEQUENCE flag value

gencer/Yaml,symfony/Yaml,symfony/yaml