fix: fix redundant Ok wrapping in install_exex closure

[0xminds]

Removed the unnecessary Ok wrapping around my_exex(ctx) since my_exex(ctx) already returns an eyre::Result<()>.

This is important because install_exex expects a closure that returns eyre::Result<()>. Wrapping the result in Ok changes the type to Result<eyre::Result<()>, _>, which would cause a compilation error or a logical issue.