Revert "Update Chrome (for Testing) PIN"

This reverts commit c6bb3b2.

Reason for revert: <breaks Network tab tests>

No-Presubmit: True
No-Tree-Checks: True
No-Try: True

Original change's description:
> Update Chrome (for Testing) PIN
>
> Chromium pin updated to 134.0.6963.0
>
> Roll created at https://cr-buildbucket.appspot.com/build/8725439779635960097
>
> Bug: none
> Change-Id: I3466d22956e9366be3960da671a65baef1c92245
> Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6183509
> Commit-Queue: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
> Bot-Commit: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>

No-Presubmit: True
No-Tree-Checks: True
No-Try: True
Bug: none
Change-Id: I95b539917358ef944ad034d39aa64bd230ed4cf2
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6180300
Reviewed-by: Simon Zünd <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Commit-Queue: Kateryna Prokopenko <[email protected]>

Author: Kateryna Prokopenko

DEPS

@@ -49,7 +49,7 @@ vars = {
   # Chrome version used for tests. It should be regularly updated to
   # match the Canary version listed here:
   # https://googlechromelabs.github.io/chrome-for-testing/last-known-good-versions.json
-  'chrome': '134.0.6963.0',
+  'chrome': '134.0.6962.0',
 
   # 'magic' text to tell depot_tools that git submodules should be accepted but
   # but parity with DEPS file is expected.