doc: remove uannecessary Require

This was the only instance were we said a parameter
was required.  It is assumed parameters are required unless
the doc says they are option.  Remove `Required` to make
consistent with the rest of the doc

Backport-PR-URL: #19265
PR-URL: #18184
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

doc/api/n-api.md

@@ -3283,7 +3283,7 @@ napi_status napi_create_async_work(napi_env env,
 - `[in] env`: The environment that the API is invoked under.
 - `[in] async_resource`: An optional object associated with the async work
   that will be passed to possible async_hooks [`init` hooks][].
-- `[in] async_resource_name`: An identifier for the kind of resource that is
+- `[in] async_resource_name`: Identifier for the kind of resource that is
 being provided for diagnostic information exposed by the `async_hooks` API.
 - `[in] execute`: The native function which should be called to excute
 the logic asynchronously.
@@ -3382,7 +3382,7 @@ napi_status napi_async_init(napi_env env,
 - `[in] env`: The environment that the API is invoked under.
 - `[in] async_resource`: An optional object associated with the async work
   that will be passed to possible `async_hooks` [`init` hooks][].
-- `[in] async_resource_name`: Required identifier for the kind of resource
+- `[in] async_resource_name`: Identifier for the kind of resource
   that is being provided for diagnostic information exposed by the
   `async_hooks` API.
 - `[out] result`: The initialized async context.