Make AMI builds public once more

Author: petetomasik

.buildkite/pipeline.yaml

@@ -57,7 +57,7 @@ steps:
     timeout_in_minutes: 60
     retry: { automatic: { limit: 3 } }
     env:
-      AMI_PUBLIC: false
+      AMI_PUBLIC: true
     agents:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE}"
     depends_on:
@@ -125,7 +125,7 @@ steps:
     timeout_in_minutes: 60
     retry: { automatic: { limit: 3 } }
     env:
-      AMI_PUBLIC: false
+      AMI_PUBLIC: true
     agents:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE}"
     depends_on:
@@ -192,7 +192,7 @@ steps:
     timeout_in_minutes: 60
     retry: { automatic: { limit: 3 } }
     env:
-      AMI_PUBLIC: false
+      AMI_PUBLIC: true
     agents:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE}"
     depends_on: