Fix typo: mongodbatlast => mongodbatlas

[sonlexqt]

Description

Please include a summary of the fix/feature/change, including any relevant motivation and context.

Link to any related issue(s):

Type of change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the Terraform contribution guidelines
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code

Further comments

[themantissa]

@sonlexqt thank you for the submission. However we need you to sign the CLA before we can approve and merge it: https://www.mongodb.com/legal/contributor-agreement

[sonlexqt]

@themantissa I've just signed the CLA

[themantissa]

Thank you @sonlexqt. Confirmed the signature. Will merge this in.