u20.04 ATSM dgpu-docs package posting got broken

[dvrogozh]

To reproduce follow public instruction for media-delivery posted here: https://www.intel.com/content/www/us/en/developer/articles/code-sample/transcoding-sample-ubuntu-20-04.html:

git clone -b release/2.1 https://github.com/intel/media-delivery.git && cd media-delivery
docker build \
  $(env | grep -E '(_proxy=|_PROXY)' | sed 's/^/--build-arg /') \
  --file docker/ubuntu20.04/intel-gfx/Dockerfile \
  --tag intel-media-delivery .

Build step will fail with:

Step 41/71 : RUN apt-get update &&   DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends     python3     python3-pip     intel-media-va-driver-non-free     libigfxcmrt7     libmfx1     libmfxgen1     libvpl2     libva-drm2     libx264-155     libx265-179     libxcb-shm0     less     man-db     libglib2.0-0     libvpl-tools     libnginx-mod-http-lua     libnginx-mod-rtmp     linux-tools-generic     nginx     pciutils     python3-matplotlib     python3-numpy     socat     tmux     vainfo     curl     sudo     vim     wget      &&   rm -rf /var/lib/apt/lists/*
 ---> Running in 20a62ace034e
Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:2 https://repositories.intel.com/graphics/ubuntu focal InRelease
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:4 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:5 http://archive.ubuntu.com/ubuntu focal-backports InRelease
...
Get:39 https://repositories.intel.com/graphics/ubuntu focal/main amd64 vainfo amd64 2.15.0.2-1 [19.7 kB]
Err:39 https://repositories.intel.com/graphics/ubuntu focal/main amd64 vainfo amd64 2.15.0.2-1
  File has unexpected size (19732 != 19716). Mirror sync in progress? [IP: 10.1.192.48 912]
  Hashes of expected file:
   - SHA512:6b960a4c52a645cdfe20a12921b28791f007927b2e19ebd8ae6342987bc4f4a2b3d13bfefe5ea10ea4f9432cfb1f7bbe93916d7bc7c327faa3e79a847e1f8ea8
   - SHA256:16f40a2085ac06456bc5604d9c7e9fa7f9bf050bbf63f5e7007f5e917391ec82
   - SHA1:e55a47b34e9340eff0c5f815539aa8a18e6a2520 [weak]
   - MD5Sum:b39ba96f3616d281bd9042f55fa9cfef [weak]
   - Filesize:19716 [weak]
...
E: Failed to fetch https://repositories.intel.com/graphics/ubuntu/pool/main/libv/libva-utils/vainfo_2.15.0.2-1_amd64.deb  File has unexpected size (19732 != 19716). Mirror sync in progress? [IP: 10.1.192.48 912]
   Hashes of expected file:
    - SHA512:6b960a4c52a645cdfe20a12921b28791f007927b2e19ebd8ae6342987bc4f4a2b3d13bfefe5ea10ea4f9432cfb1f7bbe93916d7bc7c327faa3e79a847e1f8ea8
    - SHA256:16f40a2085ac06456bc5604d9c7e9fa7f9bf050bbf63f5e7007f5e917391ec82
    - SHA1:e55a47b34e9340eff0c5f815539aa8a18e6a2520 [weak]
    - MD5Sum:b39ba96f3616d281bd9042f55fa9cfef [weak]
    - Filesize:19716 [weak]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

This did work before.