Update WATCHLISTS for 'smb' based on the new path

smb_provider_client.* are in chromeos/ash/components/dbus/smbprovider
now. So the path in WATCHLISTS is updated.

Change-Id: I1e80d0718536e2ae2ccbf330df18ef2fe08b1d07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3746036
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Commit-Queue: Yeunjoo Choi <ychoi@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1021037}

WATCHLISTS

@@ -1781,7 +1781,7 @@
     'smb': {
       'filepath': 'chrome/browser/ash/file_system_provider' \
                   '|chrome/browser/ash/smb_client'\
-                  '|chromeos/ash/components/dbus/smb_provider_client',
+                  '|chromeos/ash/components/dbus/smbprovider',
     },
     'source_idls': {
       'filepath': 'third_party/blink/renderer/(core|modules|platform)/.*\.idl',