update translations

[trantuyet]

• Replace all occurrences of “pretix” with “eventyay” across localization messages in both django.po and djangojs.po files.
• Regenerate and update translations for all supported languages to align with the latest English strings.

[sourcery-ai]

Reviewer's Guide

This PR refreshes all translation catalogs by replacing the product name “pretix” with “eventyay” and updating translations to align with revised English source strings across every supported locale.

File-Level Changes

Change	Details	Files
Refreshed translation catalogs including product name replacement and updated strings	Replaced “pretix” with “eventyay” across all .po and djangojs.po files Updated translations to match revised English source strings	src/pretix/helpers/locale/**/LC_MESSAGES/*.po src/pretix/locale/**/LC_MESSAGES/*.po src/pretix/locale/**/LC_MESSAGES/*.po.js

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[sourcery-ai]

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[mariobehling]

This PR does not build and it does not reference the issue. Please follow the best practices https://blog.fossasia.org/open-source-developer-guide-and-best-practices-at-fossasia/