update nghttp3 version to v1.6.0

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: Zoey2936

Dockerfile

@@ -3,7 +3,7 @@ FROM alpine:3.20.3 AS build
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]
 ARG CURL_VERSION=curl-8_10_1
 ARG WS_VERSION=v5.7.0-stable
-ARG NGH3_VERSION=v1.5.0
+ARG NGH3_VERSION=v1.6.0
 ARG NGTCP2_VERSION=v1.8.0
 
 RUN apk upgrade --no-cache -a && \