update README.md

Author: stroupaloop

README.md

@@ -15,7 +15,7 @@ Step-by-step on how to configure, develop & deploy this app on AWS.
 ### Pre-Requisites
 1. Sign-in to AWS or [Create an Account](https://us-west-2.console.aws.amazon.com).
 2. Pick a region in the console and be consistent throughout this app. Use either `us-east-1`, `us-west-2` & `eu-west-1`. 
-3. Create a table in DynamoDB with a single Hash named 'fromNumber' for primary key of type String. We don't need any additional indexes and you can keep the read/write capacity at 1 for this example.
+3. Create a table in DynamoDB with a single Hash named `fromNumber` for primary key of type String. We don't need any additional indexes and you can keep the read/write capacity at 1 for this example.
 4. Create an S3 bucket to ingest MMS images. 
 5. Create an IAM role with access to the S3 bucket & the DynamoDB table.
 6. Create/login to a Twilio account & create a phone number with MMS capability.