chore: Update package version upon release action

[lj3954]

Type of Change

• Bug fix

Description

Determine the previous release by searching through the current Cargo.toml. Update necessary version fields (in Cargo.toml, as well as the linutil_core dependency in the tui's Cargo.toml), replacing the previous version with the current date. Ensure that the previous version matches the expected format to reduce the possibility of erroneous replacements.

Testing

Locally running the commands correctly modifies files with the current date.

Impact

Removes the need to manually modify the versions.

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no errors/warnings/merge conflicts.

[jeevithakannan2]

This just changes the date and reflects in the binary but does not commit the changes. The changes need to be created as a PR.