[sdk] Update checked-in SDKs to 2.13.0-211.14.beta

The previous attempt to upgrade to `2.13.0-211.13.beta` was reverted:

Change-Id: Ia358fc2ec4fed3a9b8e3f85cd70a74801298ebc9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/197721
Auto-Submit: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
Commit-Queue: William Hesse <whesse@google.com>
Reviewed-by: William Hesse <whesse@google.com>
diff --git a/DEPS b/DEPS
index 606c3e7..2c75fde 100644
--- a/DEPS
+++ b/DEPS
@@ -39,7 +39,7 @@
   # Checked-in SDK version. The checked-in SDK is a Dart SDK distribution in a
   # cipd package used to run Dart scripts in the build and test infrastructure.
-  "sdk_tag": "version:2.12.0",
+  "sdk_tag": "version:2.13.0-211.14.beta",
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd