V1.31

• CUDA Images updated to 11.4.2-devel
• Docker as-well-as build script upgraded to use python3
• ninja-build and meson packages are pre-installed either via system package manager or via pip3 in favor of building dav1d codec
• cmake updated to v3.21.2
• svtav1 updated to last-known commit 1a3e32b which successfully passed pipeline
• x264 updated to commit 5db6aa6
• aom updated to v3.1.2, commit ae2be80
• Occasional sourceforge.net download fail due to downtime of mirror location is tried to bypass
• nv-codec-headers updated to v11.1.5.0
• Script slightly re-arranged to differentiate codec types

Thx to @rokibhasansagar