Escape dollar symbols so Terraform accepts the format

[fidel-perez]

Escape dollar symbols so Terraform accepts the format in destination-s3.
Without escaping the dollar symbol, there is an error when running terraform apply:

│ Error: Invalid reference
│ 
│   on destinations.tf line 31, in resource "airbyte_destination_s3" "my_destination_s3":
│   31:     s3_path_format    = "airbyte_poc/${STREAM_NAME}/$${YEAR}_$${MONTH}_$${DAY}_$${EPOCH}_"
│ 
│ A reference to a resource type must be followed by at least one attribute access, specifying the resource name.