Fix #3926

Apparently nvim assumes cnorm doesn't affect cursor shape. It's
ambiguous whether cnorm should affect it or not. So to prevent
regressions in case other programs assume that as well, have it only
make the cursor visible and blinking, without changing its shape.

terminfo/kitty.terminfo

@@ -24,7 +24,7 @@ xterm-kitty|KovIdTTY,
 	cbt=\E[Z,
 	civis=\E[?25l,
 	clear=\E[H\E[2J,
-	cnorm=\E[1 q\E[?25h,
+	cnorm=\E[?12h\E[?25h,
 	cr=^M,
 	csr=\E[%i%p1%d;%p2%dr,
 	cub=\E[%p1%dD,