You can use these steps to make it work -

Open an existing or new Colab notebook.

1. Go to File in the top menu and select Save a copy in GitHub.

2. A pop-up window will appear asking for authorization. You'll need to sign in to your GitHub account and authorize Google Colab to access your repositories.

3. Once authorized, you can select the specific repository and branch where you want to save the notebook.

This process grants Colab the necessary permissions to access and save notebooks to your GitHub account, allowing for a seamless workflow between the two platforms. You can then also open notebooks directly from GitHub using the File > Open notebook > GitHub option in Colab.

Here, you can for video solution - https://www.youtube.com/watch?v=uBY06NpnLcs