Update chrome and firefox versions.

Chrome: 133.0.6943.16
Firefox: 134.0.1
Change-Id: Ieef0d2e29cc14c723ff9643f4fdbe77675fc6c45
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/404860
Reviewed-by: Srujan Gaddam <[email protected]>
Commit-Queue: Nate Biggs <[email protected]>

Author: natebiggs

DEPS

@@ -165,9 +165,9 @@ 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": "132.0.6834.83",
+  "chrome_tag": "133.0.6943.16",
   "download_firefox": False,
-  "firefox_tag": "134.0",
+  "firefox_tag": "134.0.1",
 
   # Emscripten is used in dart2wasm tests.
   "download_emscripten": False,