de-CH: fix typo in "error-toxicComment"

[lusbuab]

What does this PR do?

Fix a typo for Swiss-German.

These changes will impact:

• [x] commenters
• [ ] moderators
• [ ] admins
• [ ] developers

What changes to the GraphQL/Database Schema does this PR introduce?

n/a

Does this PR introduce any new environment variables or feature flags?

n/a

If any indexes were added, were they added to INDEXES.md?

n/a

How do I test this PR?

n/a

Were any tests migrated to React Testing Library?

n/a

How do we deploy this PR?

n/a