ec2.RunInstances python "BlockDeviceMapping" typo

[Jon Banas]

Describe the bug
Python ec2.RunInstances "BlockDeviceMappings" parameter incorrectly generating as "BlockDeviceMapping".

Related Mapping
ec2.RunInstances

Related Language
Python

To Reproduce
Steps to reproduce the behavior:

1. Start recorder
2. From EC2 Dashboard click Launch Instance
3. Select default amazon linux 2 ami
4. Select default t2.micro instance type
5. Change default VPC/subnet to anything else.
6. Next, Next, Next
7. On security group setup page, choose any existing security group.
8. Next next finish through wizard

Expected behavior
boto3 ec2 client run_instances() argument is "BlockDeviceMappings" (see https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ec2.html#EC2.Client.run_instances). Recorder is currently outputting "BlockDeviceMapping".

For example:

response = ec2_client.run_instances(
    ImageId='ami-009d6802948d06e52',
    MaxCount=1,
    MinCount=1,
    KeyName='mykey',
    InstanceType='t2.micro',
    Placement={
        Tenancy='default'
    },
    Monitoring={
        Enabled=False
    },
    DisableApiTermination=False,
    InstanceInitiatedShutdownBehavior='stop',
    CreditSpecification={
        CpuCredits='standard'
    },
    EbsOptimized=False,
    BlockDeviceMapping=[
        {
            DeviceName='/dev/xvda',
            Ebs={
                VolumeSize=8,
                DeleteOnTermination=True,
                VolumeType='gp2'
            }
        }
    ]
)

[Ian Mckay]

Fixed the typo.

Thanks for raising!