Early Hint in HTTP3 fails - Header without colon

[superstes]

Greetings!

When this version of curl receives an early-hint header in HTTP3 - it fails with Header without colon

docker run --network=host -it --rm alpine/curl-http3 curl -v --http3 -o/dev/null -A "Early-Hint TEST" https://www.3djake.com
* Request completely sent off
< HTTP/3 103 
< link: <https://3d.nice-cdn.com/library/early-connect.js>; rel=preconnect
* Header without colon
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
* Connection #0 to host www.3djake.com left intact

# HTTP2 works
docker run --network=host -it --rm alpine/curl-http3 curl -v --http2 -o/dev/null -A "Early-Hint TEST" https://www.3djake.com
* Request completely sent off
{ [5 bytes data]
< HTTP/2 103 
< link: <https://3d.nice-cdn.com/library/early-connect.js>; rel=preconnect
< 
< HTTP/2 103 
< link: <https://3d.nice-cdn.com/library/early-connect.js>; crossorigin; rel=preconnect
< 
} [5 bytes data]
< HTTP/2 200 

For comparison - it works just fine using this curl-binary: https://github.com/stunnel/static-curl/releases/tag/8.17.0

./curl -v --http3 -o/dev/null -A "Early-Hint TEST" https://www.3djake.com
* Request completely sent off
< HTTP/3 103 
< link: <https://3d.nice-cdn.com/library/early-connect.js>; rel=preconnect
< 
< HTTP/3 103 
< link: <https://3d.nice-cdn.com/library/early-connect.js>; crossorigin; rel=preconnect
< 
< HTTP/3 200