Fix trailing single quotes at end of pets page.

Why is this change being made?

Several entries at the end of the pets page have trailing single quotes in their "story" entries, even though those "story" entries don't begin with single quotes. This is resulting in those trailing single quotes displaying on the pets page. These were likely (definitely in my case) added as a result of copy-paste errors from earlier in the file where entries have both leading and trailing quotes, but in this case is a syntax error.

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