[DEPS] Update browsers

Change-Id: I4d1940fe1cf97f70f88c41e354114d1dde0318a0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425585
Commit-Queue: Nicholas Shahan <[email protected]>
Auto-Submit: Mayank Patke <[email protected]>
Reviewed-by: Nicholas Shahan <[email protected]>
Commit-Queue: Mayank Patke <[email protected]>

Author: fishythefish

DEPS

@@ -71,9 +71,9 @@ vars = {
   # self-service update these by following the go/dart-engprod/browsers.md
   # instructions. d8, the V8 shell, is always checked out.
   "checkout_javascript_engines": False,
-  "d8_tag": "version:13.7.16",
-  "jsshell_tag": "version:137.0",
-  "jsc_tag": "version:293007",
+  "d8_tag": "version:13.8.26",
+  "jsshell_tag": "version:138.0",
+  "jsc_tag": "version:294346",
 
   # https://chrome-infra-packages.appspot.com/p/fuchsia/third_party/clang
   "clang_version": "git_revision:0454dd8c48cd771478f1ae53330ba78e71bcd7cb",
@@ -161,9 +161,9 @@ vars = {
   # meant to be downloaded by users for local testing. You can self-service
   # update these by following the go/dart-engprod/browsers.md instructions.
   "download_chrome": False,
-  "chrome_tag": "136.0.7103.25",
+  "chrome_tag": "136.0.7103.48",
   "download_firefox": False,
-  "firefox_tag": "137.0.2",
+  "firefox_tag": "138.0",
 
   # Emscripten is used in dart2wasm tests.
   "download_emscripten": False,