pw_thread_freertos: Add missing pw_assert dep

pw_thread_freertos/public/pw_thread_freertos/id_inline.h public headers
includes pw_assert/assert.h so it needs this public dependency.

Change-Id: If4d5e69cf7147b1b7ac49b7d599f3539e697b649
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/71380
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Armando Montanez <amontanez@google.com>
Pigweed-Auto-Submit: Alex Deymo <deymo@google.com>
diff --git a/pw_thread_freertos/BUILD.gn b/pw_thread_freertos/BUILD.gn
index e225721..01d0a17 100644
--- a/pw_thread_freertos/BUILD.gn
+++ b/pw_thread_freertos/BUILD.gn
@@ -56,6 +56,7 @@
     ":backend_config",
   ]
   public_deps = [
+    "$dir_pw_assert",
     "$dir_pw_interrupt:context",
     "$dir_pw_third_party/freertos",
   ]