LoadCssAsync html format fixed for critical css

[srsathish92]

Description (*)

LoadCssAsync html format fixed

Fixed Issues (if relevant)

1. Validate html error when enable critical css #26760: Validate html error when enable critical css

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[m2-assistant]

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[ihor-sviziev]

@srsathish92
Your changes looks good to me.
Could you cover your changes with some tests in order to prevent appearing this issue in future?

[srsathish92]

@ihor-sviziev I have covered unit test for AsyncCssPlugin.php & updated. can you please review now.

[ihor-sviziev]

Hi,
Changes looks really good for me, only one small adjustment still needed.
Failing integration tests looks not related to this PR

[magento-engcom-team]

Hi @ihor-sviziev, thank you for the review.
ENGCOM-6849 has been created to process this Pull Request

[engcom-Delta]

✔️ QA passed

[engcom-Echo]

Failed functional test not related to the changes in this PR test fails in 2.4-develop with MSI modules.

[m2-assistant]

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