Stop tracking Yarn install state

[thatrobotdev]

.yarn/* is already included in the .gitignore, but .yarn/install-state.gz is still tracked in git.

According to the Yarn documentation, "install-state.gz is an optimization file that you shouldn't ever have to commit. It simply stores the exact state of your project so that the next commands can boot without having to resolve your workspaces all over again." It is not required for reproducible installs and is recommended to be excluded from version control.

This change removes .yarn/install-state.gz from Git tracking, allowing the existing .gitignore rule to take effect.

[github-actions]

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[homotechsual]

thanks @thatrobotdev