fix: EMR Serverless runtime_configuration should support multiple configurtions

[trandafo]

Description

Removing a duplicate list [] to fix a bug

Motivation and Context

Fixing bug in v3.0.0 https://github.com//issues/46

Breaking Changes

• Resolves Fix EMR Serverless runtime_configuration double list #46

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

Terraform plan showed no error and displayed the changes expected and apply run with success

module.emr_apu.module.emr-serverless[0].module.emr-serverless-app-task.aws_emrserverless_application.this[0] will be updated in-place

~ resource "aws_emrserverless_application" "this" {
id = "00f******"
name = "core-2-emrapp-apu-eu-west-2"
tags = {
"Application" = "APU"
"Environment" = "2"
"EnvironmentType" = "Test"
"ManagedByTerraform" = "True"
"terraform-aws-modules" = "emr"
}
# (6 unchanged attributes hidden)

  ~ monitoring_configuration {
      ~ cloudwatch_logging_configuration {
          ~ enabled                = false -> true
          + log_group_name         = "/aws/core-2-cwlog-eu-west-2/emr-serverless"
          + log_stream_name_prefix = "agreement-price-upload"
            # (1 unchanged attribute hidden)

          + log_types {
              + name   = "SPARK_DRIVER"
              + values = [
                  + "STDERR",
                  + "STDOUT",
                ]
            }
          + log_types {
              + name   = "SPARK_EXECUTOR"
              + values = [
                  + "STDERR",
                  + "STDOUT",
                ]
            }
        }

        # (1 unchanged block hidden)
    }

  ~ runtime_configuration {
      ~ properties     = {
          ~ "spark.executor.memory"                            = "18G" -> "20G"
            # (7 unchanged elements hidden)
        }
        # (1 unchanged attribute hidden)
    }

    # (7 unchanged blocks hidden)
}

• I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 3.0.1 🎉