pin circleci windows image (facebookresearch#3248)

Summary:
Pull Request resolved: facebookresearch#3248

Build scripts can't find conda in the 'stable' image, trying to pin to a specific version.

Reviewed By: mlomeli1

Differential Revision: D53608347

fbshipit-source-id: 3f7c350608afc9c253cf0153e37ceeb4fceca92c

.circleci/config.yml

@@ -25,7 +25,7 @@ executors:
     resource_class: macos.m1.large.gen1
   windows-x86_64-cpu:
     machine:
-      image: windows-server-2019-vs2019:stable
+      image: windows-server-2019-vs2019:2023.04.1
       shell: bash.exe
     resource_class: windows.medium