with the release of rust 1.67, let's bump to 1.66.1 (#7866)

# Description

This PR bumps the required rust version to 1.66.1.

# User-Facing Changes


# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-system/src/macos.rs

@@ -154,7 +154,7 @@ unsafe fn get_unchecked_str(cp: *mut u8, start: *mut u8) -> String {
 
 #[cfg_attr(tarpaulin, skip)]
 fn get_path_info(pid: i32, mut size: size_t) -> Option<PathInfo> {
-    let mut proc_args = Vec::with_capacity(size as usize);
+    let mut proc_args = Vec::with_capacity(size);
     let ptr: *mut u8 = proc_args.as_mut_slice().as_mut_ptr();
 
     let mut mib: [c_int; 3] = [libc::CTL_KERN, libc::KERN_PROCARGS2, pid as c_int];