Update firefox and chrome versions in DEPS

Chrome: 141.0.7390.30
Firefox: 143.0.1
Change-Id: Iafdcf743ce2a5ea8cc313ca1b5b85802bc8bbe3a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/451200
Reviewed-by: Mayank Patke <[email protected]>
Commit-Queue: Nate Biggs <[email protected]>
Auto-Submit: Nate Biggs <[email protected]>
Commit-Queue: Mayank Patke <[email protected]>

Author: natebiggs

DEPS

@@ -163,9 +163,9 @@ 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": "141.0.7390.16",
+  "chrome_tag": "141.0.7390.30",
   "download_firefox": False,
-  "firefox_tag": "142.0.1",
+  "firefox_tag": "143.0.1",
 
   # Emscripten is used in dart2wasm tests.
   "download_emscripten": False,