Fix Fedora 43 helix: use fedora/43 MSQuic repo (now available)

Co-authored-by: richlander <2608468+richlander@users.noreply.github.com>

Author: Copilot

src/fedora/43/helix/amd64/Dockerfile

@@ -20,9 +20,9 @@ RUN python3 -m venv /venv \
 
 FROM library/fedora:43
 
-# Install MSQuic. Fedora 43 does not have it in the repositories, so use the Fedora 42 package
+# Install MSQuic
 
-RUN dnf config-manager addrepo --from-repofile=https://packages.microsoft.com/fedora/42/prod/config.repo \
+RUN dnf config-manager addrepo --from-repofile=https://packages.microsoft.com/fedora/43/prod/config.repo \
     && dnf install --setopt=install_weak_deps=False --setopt tsflags=nodocs -y \
         libmsquic