fix: PHP formatting in UserAvatarTest

[CarlSchwan]

Summary

Fix the pipeline on master

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[kesselb]

Regression from #51855

[hamza221]

Included here https://github.com/nextcloud/server/pull/50092/files#diff-2fe55e6faf02a44fa221d7cce49bbb131a9cd18a74a27b914f89da1b118d00a0L30 by mistake after running cs:fix

[st3iny]

I just checked locally and this PR is already included in master.

I think we can close this.

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