chore: fix typos

Co-authored-by: ii14 <ii14@users.noreply.github.com>

src/nvim/lua/vim.lua

@@ -454,7 +454,7 @@ local on_key_cbs = {}
 ---                   On each key press, Nvim passes the key char to fn(). |i_CTRL-V|
 ---                   If {fn} is nil, it removes the callback for the associated {ns_id}
 ---@param ns_id number? Namespace ID. If nil or 0, generates and returns a new
----                    |nvim_create_namesapce()| id.
+---                    |nvim_create_namespace()| id.
 ---
 ---@return number Namespace id associated with {fn}. Or count of all callbacks
 ---if on_key() is called without arguments.