CI: add GOSUMDB

Author: aramprice

ci/pipelines/stemcells-windows.yml

@@ -587,7 +587,8 @@ jobs:
     tags: [*internal_worker_tag]
     params:
       SOURCE_PATH: stembuild
-      GOPROXY: https://((broadcom_artifactory_mirrors.username)):((broadcom_artifactory_mirrors.password))@((broadcom_artifactory_mirrors.golang)),off
+      GOPROXY: https://((broadcom_artifactory_mirrors.username)):((broadcom_artifactory_mirrors.password))@((broadcom_artifactory_mirrors.goproxy)),off
+      GOSUMDB: https://((broadcom_artifactory_mirrors.gosumdb))
     input_mapping:
       input_repo: stemcell-builder
     output_mapping:
@@ -597,7 +598,8 @@ jobs:
     tags: [*internal_worker_tag]
     params:
       SOURCE_PATH: acceptance_test
-      GOPROXY: https://((broadcom_artifactory_mirrors.username)):((broadcom_artifactory_mirrors.password))@((broadcom_artifactory_mirrors.golang)),off
+      GOPROXY: https://((broadcom_artifactory_mirrors.username)):((broadcom_artifactory_mirrors.password))@((broadcom_artifactory_mirrors.goproxy)),off
+      GOSUMDB: https://((broadcom_artifactory_mirrors.gosumdb))
     input_mapping:
       input_repo: stemcell-builder
     output_mapping: