message: docker: fix tags
diff: @@ -7,9 +7,9 @@ docker build -f Dockerfile-Fedora-35 -t mavsdk/mavsdk-fedora-35 .
  docker build -f Dockerfile-Ubuntu-20.04 -t mavsdk/mavsdk-ubuntu-20.04 .
  docker build -f Dockerfile-Ubuntu-20.04-PX4-SITL-v1.11 -t mavsdk/mavsdk-ubuntu-20.04-px4-sitl-v1.11 .
  docker build -f Dockerfile-Ubuntu-20.04-PX4-SITL-v1.12 -t mavsdk/mavsdk-ubuntu-20.04-px4-sitl-v1.12 .
  -docker build -f Dockerfile.dockcross-linux-armv6-custom -t mavsdk/mavsdk-dockcross-armv6-custom .
  -docker build -f Dockerfile.dockcross-linux-armv7-custom -t mavsdk/mavsdk-dockcross-armv7-custom .
  -docker build -f Dockerfile.dockcross-linux-arm64-custom -t mavsdk/mavsdk-dockcross-arm64-custom .
  +docker build -f Dockerfile.dockcross-linux-armv6-custom -t mavsdk/mavsdk-dockcross-linux-armv6-custom .
  +docker build -f Dockerfile.dockcross-linux-armv7-custom -t mavsdk/mavsdk-dockcross-linux-armv7-custom .
  +docker build -f Dockerfile.dockcross-linux-arm64-custom -t mavsdk/mavsdk-dockcross-linux-arm64-custom .
  docker push mavsdk/mavsdk-fedora-34:latest
  docker push mavsdk/mavsdk-fedora-35:latest
  