Fix broken PrsonImage migration

[VirginiaDooley]

Fixes https://democracy-club-gp.sentry.io/issues/5611204775/?referrer=github-open-pr-bot

[sentry-io[bot]]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: ynr/apps/people/migrations/0047_alter_personimage_options_personimage_created_and_more.py

Function	Unhandled Issue
get_timestamp_from_queued_image	AttributeError: 'NoneType' object has no attribute 'updated' people.migrations.0047_alter_personimage_options_personimage_created_and_more in get_timestampfrom... Event Count: 2

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[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ AttributeError: 'QueuedImage' object has no attribute 'modified' people.migrations.0047_alter_personimage_option... View Issue

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