hotline : #163926 : update indexation for carac "ç"

 * rewrite indexation
 * convert utf8
4 jobs for hotline#163926_recherche in 20 minutes and 6 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #46970
bladerunner
test:php74_bokeh

00:20:06

passed #46971
sandbox
test:php74_other

00:07:43

passed #46972
bladerunner
test:php81_bokeh

00:18:27

passed #46973
sandbox
test:php81_other

00:07:42