[Ash] Update //chrome/browser/ash/release_notes/BUILD.gn

Update build.gn file as gn check recommended a nacl
dependency, this has been fixed to include a non-nacl
dep.

In addition to that also change from source_set to
static_library.

Bug: b:335294197
Change-Id: I7ebbcd0fe1a2c2667a1a06f7d4beb3ebe3a7f9c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5667173
Commit-Queue: Fahad Mansoor <fahadmansoor@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1322063}