Update go to 1.19 (#21361)
Update go to 1.19 (#21361)

It appears that updating go to 1.19 for playwright was missed when we
updated to go 1.19 elsewhere.

Signed-off-by: Andrew Thornton <6a547fdd28db89120bdd70d4af1f9ba672ccd43a@cantab.net>

go-gitea/gitea,go-gitea/gitea,go-gitea/gitea