mutable-to-immutable.rs

// Old code
#[derive(Accounts)]
pub struct PrintAccounts<'info> {
    foo_account: Account<'info, FooAccount>,
    #[account(mut)]
    bar_account: Account<'info, BarAccount>,
}
    
// New code
#[derive(Accounts)]
pub struct PrintAccounts<'info> {
    foo_account: Account<'info, FooAccount>,
    bar_account: Account<'info, BarAccount>,
}