Maintenance: Update docs base origin url

[hjgraca]

Summary

Update base origin variable in mkdocs javascript

Why is this needed?

Due to the move to the new domain docs.powertools.aws.dev we need to update the old entries that point to awslabs.github.io

Which area does this relate to?

Governance

Solution

Change awslabs.github.io to docs.powertools.aws.dev

Acknowledgment

• This request meets Powertools for AWS Lambda (Java) Tenets
• Should this be considered in other Powertools for AWS Lambda (Java) languages? i.e. Python, TypeScript

[jeromevdl]

fixed in #1238