correct reference to environment variable in testenv:chalice-deploy

Author: mattsb42-aws

decrypt_oracle/tox.ini

@@ -79,7 +79,7 @@ commands =
     chalice package {envtmpdir}/packaged
     aws cloudformation package \
         --template-file {envtmpdir}/packaged/sam.json \
-        --s3-bucket $APP_S3_BUCKET \
+        --s3-bucket {env:APP_S3_BUCKET} \
         --output-template-file transformed.yaml