Put quotes around %v for windows env variable

Signed-off-by: Jeremiah Snapp <[email protected]>

Author: jeremiahsnapp

templates/aws-stack.yml

@@ -785,7 +785,7 @@ Resources:
                   powershell -file C:\buildkite-agent\bin\bk-configure-docker.ps1 >> C:\buildkite-agent\elastic-stack.log
 
                   $Env:BUILDKITE_STACK_NAME="${AWS::StackName}"
-                  $Env:BUILDKITE_STACK_VERSION=%v
+                  $Env:BUILDKITE_STACK_VERSION="%v"
                   $Env:BUILDKITE_SCALE_IN_IDLE_PERIOD="${ScaleInIdlePeriod}"
                   $Env:BUILDKITE_SECRETS_BUCKET="${LocalSecretsBucket}"
                   $Env:BUILDKITE_AGENT_TOKEN="${BuildkiteAgentToken}"