Switch the DynamoDB provisioning to on-demand for examples

No sense in these being provisioned

README.adoc

@@ -114,4 +114,4 @@ a `.parquet` file is added to the bucket/prefix.
 
 == Licensing
 
-This repository is licensed under the link:https://www.gnu.org/licenses/agpl-3.0.en.html[AGPL 3.0]. If your organization is interested in re-licensing this function for re-use, contact me via email for commercial licensing terms: `rtyler@brokenco.de`
+This repository is licensed under the link:https://www.gnu.org/licenses/agpl-3.0.en.html[AGPL 3.0]. If your organization is interested in re-licensing this function for re-use, contact me via email for commercial licensing terms: `rtyler@buoyantdata.com`

deployment/advanced.tf

@@ -111,7 +111,7 @@ resource "aws_lambda_permission" "advanced-allow-bucket" {
 # tables.
 resource "aws_dynamodb_table" "oxbow_advanced_locking" {
   name         = "oxbow_advanced_lock_table"
-  billing_mode = "PROVISIONED"
+  billing_mode = "PAY_PER_REQUEST"
   # Default name of the partition key hard-coded in delta-rs
   hash_key       = "key"
   read_capacity  = 10

deployment/simple.tf

@@ -112,7 +112,7 @@ resource "aws_iam_role" "iam_for_lambda" {
 # tables.
 resource "aws_dynamodb_table" "oxbow_locking" {
   name         = "oxbow_lock_table"
-  billing_mode = "PROVISIONED"
+  billing_mode = "PAY_PER_REQUEST"
   # Default name of the partition key hard-coded in delta-rs
   hash_key       = "key"
   read_capacity  = 10