fix: Lint and unit tests require a token sometimes for getting required binaries

[sbp-bvanb]

This pull request includes updates to the README.md and action.yml files to improve documentation and enhance the configuration of GitHub Actions for the project. The most important changes include the addition of a new input for downloading private Go modules, updates to the formatting of tables in the README, and changes to the environment variables used in the GitHub Actions workflow.

Documentation updates:

• README.md: Improved formatting of tables and added a new option for github-token-for-downloading-private-go-modules in the list of variables. [1] [2]

GitHub Actions configuration:

• action.yml: Added a new input for github-token-for-downloading-private-go-modules to handle private Go modules.
• action.yml: Updated the GitHub Actions workflow to configure Git with the new input for downloading private Go modules.
• action.yml: Changed the environment variable from TASK_X_REMOTE_TASKFILES to GITHUB_TOKEN for running remote tasks in the lint and unit test steps. [1] [2]