update plugin-grunt-tasks to 2.4 and update date format in readme.txt

[noud-github]

Context

• Update plugin-grunt-tasks 2.3 => 2.4
• this will change the initial date format (to yyyy-mm-dd) used when creating a new RC,
• updated a dependancy from master to main
• updates the date format in readme.txt

Summary

This PR can be summarized in the following changelog entry:

• Updates the grunt-plugin-tasks dependency to 2.4 ( this will change the initial date format to yyyy-mm-dd when creating a new RC).
• Updates the date format in README.md.
• Updates a dependency from master to main.

Relevant technical choices:

*

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• verify the readme.txt

Relevant test scenarios

• [ ] Changes should be tested with the browser console open
• [ ] Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• [ ] Changes should be tested on different editors (Block/Classic/Elementor/other)
• [ ] Changes should be tested on different browsers
• [ ] Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• [ ] QA should use the same steps as above.

QA can test this PR by following these steps:

*

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

*

UI changes

• [ ] This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Documentation

• [ ] I have written documentation for this change.

Quality assurance

• [X] I have tested this code to the best of my abilities
• [ ] I have added unittests to verify the code works as intended

Innovation

• [X] No innovation project is applicable for this PR.
• [ ] This PR falls under an innovation project. I have attached the innovation label and noted the work hours.

Fixes #