Typo: README usage instructions refer to incorrect smalloc crate; actual crate is smmalloc

[hard-nett]

issue identified by me, description ~90% generated by Grok ::)

This README provides the following usage example for adding and using the allocator in Rust code:

cargo add smalloc

and

use smalloc::Smalloc;
#[global_allocator]
static ALLOC: Smalloc = Smalloc::new();

However, the published crate on crates.io is named smmalloc (see https://crates.io/crates/smmalloc), not smalloc.

This mismatch will cause confusion and errors for users attempting to follow the instructions directly:

cargo add smalloc will import the incorrect crate.
use smalloc::Smalloc; will not compile when depending on the actual smalloc crate.

Suggested fix:

Update the crate to make use of a name that does not conflict with existing crates, and does not have redundant/confusing syntax.

One possibility is simpalloc, which is short for simple-allocator, currently unused, and funny.

cargo add simpalloc

use simpalloc::Simpalloc;
#[global_allocator]
static ALLOC: Simpalloc = Simpalloc::new();

If the crate was intentionally renamed to simpalloc (e.g., due to name conflicts), adding a short note explaining the rename would also help avoid confusion.

[hard-nett]

updated all smalloc instances into simpalloc in this branch: https://github.com/permissionlessweb/smalloc/tree/fix/crate-name-typo