cros_healthd: sync mojom file

Adopt branding attributes. See CL:3495228.

Bug: b:210972707
Change-Id: Iaf81c39d6baef45c35f8c0d9adb42c271cd6947b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3509062
Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Chung-Sheng Wu <chungsheng@chromium.org>
Commit-Queue: Denny Huang <dennyh@google.com>
Cr-Commit-Position: refs/heads/main@{#981574}

chromeos/services/cros_healthd/public/mojom/cros_healthd_probe.mojom

@@ -596,7 +596,7 @@ struct SystemInfo {
   string? product_serial_number@3;
   // The product model name.
   string? product_model_name@4;
-  // Contents of CrosConfig in /arc/build-properties/marketing-name.
+  // Contents of CrosConfig in /branding/marketing-name.
   string marketing_name@5;
   // The BIOS version.
   string? bios_version@6;
@@ -637,7 +637,7 @@ struct OsInfo {
   // searchable-key in metrics collection, it is not recommended to use this
   // property for creating model-specific behaviors.
   string code_name@0;
-  // Contents of CrosConfig in /arc/build-properties/marketing-name.
+  // Contents of CrosConfig in /branding/marketing-name.
   string? marketing_name@1;
   // The OS version of the system.
   OsVersion os_version@2;