Update create-s3-bucket.md

general-> specific headings allows for additional doc on FSx, EFS, etc

Author: LisaMc

docs/core-env/create-s3-bucket.md

@@ -1,4 +1,4 @@
-# Creating an S3 Bucket
+# Data Storage
 
 You will need a robust location to store your input and output data.  As mentioned
 previously, genomics data files are fairly large.  In addition to input sample
@@ -12,6 +12,8 @@ The following are key criteria for storing data for genomics workflows
 * durable
 * capable of handling large files
 
+## Create an S3 Bucket
+
 Amazon S3 buckets meet all of the above conditions.
 
 You can use an existing bucket for your workflows, or you can create a new one using the CloudFormation template below.