Update google_benchmark

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/7eb8c0f..6d50251

Report large numbers in scientific notation in console reporter (#1303) (#1402) (Matthdonau)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/6d50251

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Change-Id: I7472ffb68d98ea430e907a9d542691108cbe0db1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3673183
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80791}

DEPS

@@ -235,7 +235,7 @@ deps = {
     'dep_type': 'cipd',
   },
   'third_party/google_benchmark/src': {
-    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + '7eb8c0fe45c2893f13863f2fa317c46db0336c4e',
+    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + '6d50251d8e6ed6b7f6eb1e12c558d2808fb4ddaa',
   },
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + 'af29db7ec28d6df1c7f0f745186884091e602e07',