fix(deps): update dependency i18next-icu to ^2.4.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
i18next-icu	^2.4.3 → ^2.4.4

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Release Notes

i18next/i18next-icu (i18next-icu)

v2.4.4

Compare Source

• security: guard the shared getLastOfPath / setPath / pushPath walker against prototype pollution. The memoize cache key is ${lng}.${ns}.${key} and only the trailing key is dot-escaped, so an unescaped ns segment named __proto__ / constructor / prototype walked straight into Object.prototype (with the default memoize: true, parse(..., 'en', '__proto__', 'greeting') cached the formatter on Object.prototype.greeting). The walker now refuses unsafe segments and drops the write; legitimate dotted/nested keys and normal memoization are unaffected. Same walker / same fix as i18next-fs-backend@2.6.6 (GHSA-2933-q333-qg83) and i18next-http-middleware@3.9.7 (GHSA-f49m-vf83-692w). Thanks @​greymoth-jp (#​87)
• security (defence-in-depth): defaults() / extend() now iterate own keys via Object.keys() and skip __proto__ / constructor / prototype, so a polluted or crafted options source can't seed Object.prototype during option merging

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