form_builder.js fix typo

4 jobs for dev in 41 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test Tools
passed #78461
test_tools

00:00:05

 
  Test Quality
passed #78462
web
code_quality

00:00:10

 
  Test Unit
passed #78463
web
test_browser_unit

00:00:10

passed #78464
web
test_server_unit

00:00:14