Fixed "age this year" report column

We've corrected a small issue with the "age this year" column in the people reports. This column is designed to show a person's age at the end of the current year—helpful for knowing how old someone will be turning. It is used in the built-in "Birthdays" report.

Previously, if someone was less than a year old by December 31st, the column displayed their age in months and weeks. While technically accurate, this could be confusing.

We've now simplified it to display "< 1 year old" instead.