Chore: Update bucket name

Author: bwlynch

.ebextensions/privatekey.config

@@ -17,4 +17,4 @@ files:
     owner: root
     group: root
     authentication: "S3Auth"
-    source: https://s3.amazonaws.com/elasticbeanstalk-private-keys/demcloud.org.pem
+    source: https://s3.amazonaws.com/cybersim-elasticbeanstalk-key/demcloud.org.pem