Adjust maximum number of requests on rack_attack for avoiding constant HTTP error 429

Signed-off-by: Rafael Ravedutti <rrlmachado@inf.ufpr.br>
2 jobs for fix_http_429 in 4 minutes and 48 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Test
passed #24868
ruby postgres
test

00:02:04

 
  Build
passed #24869
docker build
build

00:02:44