Add ninja-build to build environment (for doxygen, for instance)

Author: howetuft

.github/workflows/wheel-builder.yml

@@ -310,6 +310,7 @@ jobs:
             dnf install -y almalinux-release-devel
             dnf install -y ccache
             dnf install -y perl-IPC-Cmd perl-Digest-SHA
+            dnf install -y ninja-build
 
             # Install gh (via conda)
             dnf install -y wget