corrected system/volunteers_test.rb to match the datepicker

2 jobs for feat/volunteers_add_full_date_of_birth in 36 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #137196
system

00:36:47

passed #137195
test

00:19:14

 
Name Stage Failure
failed
system Test

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Finished in 1793.819940s, 0.1672 runs/s, 0.8591 assertions/s.
300 runs, 1541 assertions, 0 failures, 1 errors, 0 skips
Uploading artifacts...
tmp/screenshots: found 2 matching files
Uploading artifacts to coordinator... ok id=137196 responseStatus=201 Created token=EBG7Dm_H
ERROR: Job failed: command terminated with exit code 1