docs: on:keydown -> onkeydown (#11343)

Author: Rich-Harris

sites/svelte-5-preview/src/routes/docs/content/02-examples/02-fine-grained-reactivity.md

@@ -28,7 +28,7 @@ In Svelte 4, reactivity centres on the _component_ and the top-level state decla
 	}
 </script>
 
-<input on:keydown={addTodo} />
+<input onkeydown={addTodo} />
 
 {#each todos as todo}
 	<div>
@@ -40,7 +40,7 @@ In Svelte 4, reactivity centres on the _component_ and the top-level state decla
 <p>{remaining(todos)} remaining</p>
 ```
 
-...editing any individual `todo` will invalidate the entire list. You can see this for yourself by [opening the playground](/#H4sIAAAAAAAAE2VSy27jMAz8FVV7cAIE8t21DfSwf7C3OgdVohOhCmXIdLaF4H9fPewE6N7I0ZAzpBj4aCzMvHkPHOUNeMPfpomfOH1PKZnvYAliPrvFq4S0s_Jmon7AgSwQI6fdzDr2fn6NUATHBRUZh8zDTRo0eDlkzpGF9DyQcjg7C8K6y6HyoKRVi5UUidXxtVA80OKx9BbRIYHPTVjXs5cUCO0QjsICXuiai9Yf6lLrP5F4gDsgPbTNyAoiPuGbvXQdq35j7F4dWdHchhjoMVdJBxJCZOy0A2EPBkpuGjZKO8PpiRJ8UcOKHEl_ARJ3aRfYGWsJzg_N_6nRQFXt87X1c_fYGpwWYg6bOIl2f7EL28grqzMj_AKprtsHyTkHWbLV5t4Xxa3Lh0HdZMEu5PUm61ufJyvdRDdwdQX1-eG-Bl7qcg56q0yr2CvbuiiFOjnJP9ROffh5GOvzVNp66uO13Zw2owHNG_ILrOf1H3DaaQeoAgAA), adding some todos, and watching the console in the bottom right. `remaining(todos)` is recalculated every time we edit the `text` of a todo, even though it can't possibly affect the result.
+...editing any individual `todo` will invalidate the entire list. You can see this for yourself by [opening the playground](/#H4sIAAAAAAAAE2VSy27jMAz8FVV7cAIE8t21DfSwf7C3OgdVohOhCmXIdLaF4H9fPewE6N7I0ZAzpBj4aCzMvHkPHOUNeMPfpomfOH1PKZnvYAliPrvFq4S0s_Jmon7AgSwQI6fdzDr2fn6NUATHBRUZh8zDTRo0eDlkzpGF9DyQcjg7C8K6y6HyoKRVi5UUidXxtVA80OKx9BbRIYHPTVjXs5cUCO0QjsICXuiai9Yf6lLrP5F4gDsgPbTNyAoiPuGbvXQdq35j7F4dWdHchhjoMVdJBxJCZOy0A2EPBkpuGjZKO8PpiRJ8UcOKHEl_ARJ3aRfYGWsJzg_N_6nRQFXt87X1c_fYGpwWYg7jINr9xS5sE6-szoTwC6S6bv8j5xxkxVabe18EtyYfBnWT9bqQt5ucb32erHQS3cDVFdTnh_saeKnLOeitMm1ir2zrohTq5CR_UDv14eddrM9Laeupj8d2c9qMBjRvyC-wntd_ggUqOqcCAAA=), adding some todos, and watching the console in the bottom right. `remaining(todos)` is recalculated every time we edit the `text` of a todo, even though it can't possibly affect the result.
 
 Worse, everything inside the `each` block needs to be checked for updates. When a list gets large enough, this behaviour has the potential to cause performance headaches.
 
@@ -76,4 +76,4 @@ With runes, it's easy to make reactivity _fine-grained_, meaning that things wil
 </script>
 ```
 
-In [this version of the app](/#H4sIAAAAAAAAE2VSy07EMAz8lRCQ2kqovZe2Egf-gBvlEBJ3N9qsUyXuAqr67-TRZSW4xfZ4xh5n5ZM24Hn7tnIUZ-Atf55n_sjpe46Bv4AhCLG3i5Mx03np9EzDiCMZIEZWWc969uBJEJRv79VTKIXitKAkbZE5OAuNGg9lwlZsjeWRpEVvDdTGHsrCgRRGLkZQABaJI0Ac0OIwa9RhUgKXSFg_sLv4qJVFqGoDeKBjatr-qAulXgOwhAsg_WrrieVMfYJvdtf3rHjBwF5ULGvuS4yUtefFH8u9d6Qo2rJJGA-P1xzBF7Usc5JwB6D6IswCub5Vv4T_IcG9orgO3zU3g7HTOC_ELLZhTGU_sV_3fTbWJMR6D0Ie9ysInx7RAuqUvgxZcWf50KjaJNivybs48s5zQ8XD9yOXR5CnD_s18tyXYlB7ZzTg2tk1WWlt4iTJ_m4e1r9X327_oGvmIXyps1V60qB4S26B7X37AXGd34ONAgAA), editing the `text` of a todo won't cause unrelated things to be updated.
+In [this version of the app](/#H4sIAAAAAAAAE2VSy07EMAz8lRCQ2kqovZe2Egf-gBvlEBJ3N9qsUyXuAqr67-TRZSW4xfZ4Zmxn5ZM24Hn7tnIUZ-Atf55n_sjpe46Bv4AhCLG3i5Mx03np9EzDiCMZIEZWWc969uBJEJRv79VTKIXitKAkbZE5OAuNGg9lwlZsjeWRpEVvDdTGHsrCgRRGLkZQABaJI0Ac0OIwa9TBKYFLJKwf2F181MoiVLUBPNAxNW1_1IVSrwFYwgWQfrX1xHKmPsE3u-t7VrxgYC8qljX3IUbK2vPij-XeO1IUbdkkjIfHa47gi1qWOUm4A1B9EWaBXN-qX8L_kLC9oria75rbgrHTOC_ELAaXyn5iv-7jbKxJgPUehDzuRxA-PeIGqFP6MmTBneRDo2qTXr-m1UXHO88NFe_ej1weQZ4-7NfIc1-KQe2dcf5rZ9dkpbWJTtL2u3lY_x59u32DrpmH8KPOVulJg-ItuQW29-0HkdosMowCAAA=), editing the `text` of a todo won't cause unrelated things to be updated.