Fix grammar in czech version of talks overview

4 jobs for production in 2 minutes and 44 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint Build Test
passed #332892848
build

00:00:41

passed #332892846
lint

00:01:47

passed #332892849
test

00:00:45

 
  Deploy
passed #332892850
firebase-deploy

00:00:56