try swapping to something I saw in onees teams chat

Author: scbedd

eng/pipelines/templates/jobs/ci.tests.yml

@@ -63,7 +63,7 @@ jobs:
 
     pool:
       name: $(Pool)
-      vmImage: $(OsVmImage)
+      image: $(OsVmImage)
       os: $(os)
 
     ${{ if eq(parameters.UsePlatformContainer, 'true') }}:

eng/pipelines/templates/stages/platform-matrix.json

@@ -8,7 +8,7 @@
     "Agent": {
       "windows-2022": { "OSVmImage": "azsdk-pool-mms-win-2022-1espt", "Pool": "azsdk-pool-mms-win-2022-1es-pt", "os": "windows" },
       "ubuntu-20.04": { "OSVmImage": "azsdk-pool-mms-ubuntu-2004-1espt", "Pool": "azsdk-pool-mms-ubuntu-2004-1es-pt", "os": "linux"},
-      "macos-11": { "OSVmImage": "macos-11", "Pool": "Azure Pipelines", "os": "macOs" }
+      "macos-11": { "OSVmImage": "macos-latest", "Pool": "Azure Pipelines", "os": "macOs" }
     },
     "PythonVersion": [ "3.8", "pypy3.9", "3.11", "3.10" ],
     "CoverageArg": "--disablecov",