use_state: fix/clarify docstring

[ydirson]

These are a few fixes that ought to make use_state easier to apprehend for newbies.

[github-actions]

Benchmark - core

Yew Master

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.648 ns      │ 2.808 ns      │ 2.658 ns      │ 2.661 ns      │ 100     │ 1000000000

Pull Request

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.47 ns       │ 2.659 ns      │ 2.474 ns      │ 2.479 ns      │ 100     │ 1000000000

[github-actions]

Visit the preview URL for this PR (updated for commit bd51a8d):

https://yew-rs-api--pr3570-docfix-usestate-3nmdtfnw.web.app

_{(expires Fri, 29 Dec 2023 20:57:21 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

[github-actions]

Benchmark - SSR

Yew Master

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	289.253	289.897	289.497	0.242
Hello World	10	492.672	513.084	497.676	6.202
Function Router	10	1612.841	1629.431	1620.665	4.772
Concurrent Task	10	1005.707	1006.929	1006.255	0.366
Many Providers	10	1118.801	1161.834	1132.940	15.296

Pull Request

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	289.324	295.159	290.104	1.785
Hello World	10	494.895	512.133	500.201	5.900
Function Router	10	1663.789	1686.854	1676.673	7.591
Concurrent Task	10	1005.956	1006.845	1006.348	0.282
Many Providers	10	1091.801	1177.594	1130.241	22.673

[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
async_clock	101.083	101.083	0	0.000%
boids	174.749	174.749	0	0.000%
communication_child_to_parent	93.473	93.473	0	0.000%
communication_grandchild_with_grandparent	106.454	106.454	0	0.000%
communication_grandparent_to_grandchild	101.708	101.708	0	0.000%
communication_parent_to_child	89.813	89.813	0	0.000%
contexts	106.581	106.581	0	0.000%
counter	86.854	86.854	0	0.000%
counter_functional	87.261	87.261	0	0.000%
dyn_create_destroy_apps	89.699	89.699	0	0.000%
file_upload	100.729	100.729	0	0.000%
function_memory_game	173.496	173.496	0	0.000%
function_router	350.745	350.745	0	0.000%
function_todomvc	162.206	162.206	0	0.000%
futures	230.408	230.408	0	0.000%
game_of_life	111.113	111.113	0	0.000%
immutable	188.435	188.435	0	0.000%
inner_html	80.555	80.555	0	0.000%
js_callback	110.321	110.321	0	0.000%
keyed_list	200.069	200.069	0	0.000%
mount_point	83.444	83.444	0	0.000%
nested_list	114.665	114.665	0	0.000%
node_refs	90.965	90.965	0	0.000%
password_strength	1751.691	1751.691	0	0.000%
portals	94.197	94.197	0	0.000%
router	319.565	319.565	0	0.000%
simple_ssr	141.324	141.324	0	0.000%
ssr_router	388.956	388.956	0	0.000%
suspense	116.551	116.551	0	0.000%
timer	89.367	89.367	0	0.000%
timer_functional	98.733	98.733	0	0.000%
todomvc	142.512	142.512	0	0.000%
two_apps	86.574	86.574	0	0.000%
web_worker_fib	135.577	135.577	0	0.000%
web_worker_prime	185.961	185.961	0	0.000%
webgl	83.116	83.116	0	0.000%

✅ None of the examples has changed their size significantly.

[ranile]

Thanks, I'm happy with this change