chore: bump chromium in DEPS to 91.0.4472.77 (#29321)

Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>

DEPS

@@ -14,7 +14,7 @@ gclient_gn_args = [
 
 vars = {
   'chromium_version':
-    '91.0.4472.69',
+    '91.0.4472.77',
   'node_version':
     'v14.16.0',
   'nan_version':