Fix convert error and use saleschannel name translation

[MelvinAchterhuis]

• Fix https://github.com/FriendsOfShopware/FroshPlatformTemplateMail/issues/70, use 'Administration' as fallback name when no salesChannelId is present in the dataBag
• Use getTranslation('name') for retrieving salesChannel name

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.62%. Comparing base (269fd74) to head (3fde124). Report is 25 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Subscriber/FlowSubscriber.php	83.33%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #71      +/-   ##
============================================
- Coverage     89.58%   83.62%   -5.96%     
- Complexity       78       89      +11     
============================================
  Files            10       12       +2     
  Lines           240      287      +47     
============================================
+ Hits            215      240      +25     
- Misses           25       47      +22     

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[shyim]

whoopsiee i merged https://github.com/FriendsOfShopware/FroshPlatformTemplateMail/pull/78 🙈 . I will close this then. Anyway thanks 🙈