docs: remove note about firefox not supporting ESM imports in Web Workers

[DCzajkowski]

Description

According to caniuse.com and my tests, Firefox supports ESM imports in Web Workers as of 114. This PR updates changes introduced in #13223

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
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[patak-dev]

Thanks!