[infra] Update trusted root certs

related #32131

Change-Id: Icfa5322cbb88af625ce612f7b06fb6248bc3d330
Reviewed-on: https://dart-review.googlesource.com/40860
Reviewed-by: Siva Annamalai <[email protected]>
Commit-Queue: Zach Anderson <[email protected]>

Author: zanderso

DEPS

@@ -119,7 +119,7 @@ vars = {
   "pub_semver_tag": "@1.3.2",
   "quiver_tag": "@0.28.0",
   "resource_rev":"@af5a5bf65511943398146cf146e466e5f0b95cb9",
-  "root_certificates_rev": "@a4c7c6f23a664a37bc1b6f15a819e3f2a292791a",
+  "root_certificates_rev": "@16ef64be64c7dfdff2b9f4b910726e635ccc519e",
   "shelf_static_rev": "@3558aa35a0d2f0f35868c3fd64b258e140db0122",
   "shelf_packages_handler_tag": "@1.0.3",
   "shelf_tag": "@0.7.1",