Polylang Pro 3.6.5

* Pro: Fix XLIFF files not correctly imported when exported from older version than 3.6
* Pro: Fix translated categories not assigned to translated post when using machine translation
* Pro: Fix 'lang' param not applied for secondary queries during a REST request
* Pro: Fix newlines for content edited in classic editor and translated with DeepL
* Pro: Fix a conflict with the Stream plugin on multisite

* Pro: Fix ACF fields not sn after a post was translated with DeepL
* Remove rewrite when registering the language taxonomy #1457
* Fix search block not filtered when displayed as button only #1459
* Fix current language not kept when using switch_to_blog() in multisite #1458

* Pro: Security: Fix unsafe custom style injection in navigation language switcher block