./install_mkl.sh error:

./install_mkl.sh: Your system is using debian-style package management.
+ apt-get update
Hit:1 https://packages.cloud.google.com/apt gcsfuse-focal InRelease
Hit:2 https://packages.cloud.google.com/apt cloud-sdk InRelease
Hit:3 https://packages.cloud.google.com/apt google-fast-socket InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:5 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64 InRelease
Get:6 https://apt.repos.intel.com/mkl all InRelease [4438 B]
Hit:7 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:8 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:9 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Err:6 https://apt.repos.intel.com/mkl all InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY BAC6F0C353D04109
Reading package lists... Done
W: GPG error: https://apt.repos.intel.com/mkl all InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY BAC6F0C353D04109
E: The repository 'https://apt.repos.intel.com/mkl all InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
./install_mkl.sh: MKL package intel-mkl-64bit-2020.0-088 installation FAILED.

Please open an issue with us at https://github.com/kaldi-asr/kaldi/ if you
believe this is a bug.

I'm running this on kaggle notebook. Please help me resolve it