[test] Fix mac-arm64 builder dimension after OS upgrade

No-Try: true
Bug: chromium:1156547
Change-Id: Idb7e43732da6100ee9ff28ad03785a4dc8972c2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2739640
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73222}

infra/testing/builders.pyl

@@ -696,7 +696,7 @@
   'v8_mac_arm64_rel_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'arm64',
-      'os': 'Mac-11.0',
+      'os': 'Mac-11',
       'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
@@ -706,7 +706,7 @@
   'v8_mac_arm64_dbg_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'arm64',
-      'os': 'Mac-11.0',
+      'os': 'Mac-11',
       'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
@@ -716,7 +716,7 @@
   'v8_mac_arm64_full_dbg_ng_triggered': {
     'swarming_dimensions' : {
       'cpu': 'arm64',
-      'os': 'Mac-11.0',
+      'os': 'Mac-11',
       'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
@@ -1360,7 +1360,7 @@
   },
   'V8 Mac - arm64 - release': {
     'swarming_dimensions' : {
-      'os': 'Mac-11.0',
+      'os': 'Mac-11',
       'cpu': 'arm64',
       'pool': 'chromium.tests.mac-arm64',
     },