TPAC - Syntax error breaks place-hold page

A recently introduced <label> tag had a ' mismatched with a ", breaking
the pickup library selector on the TPAC place-hold interface.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>