update postgresql json to add post install password setup

[rdiazlugo]

✍️ Description

Update Postgresql to add a post install note to quickly setup the postgres' user password

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🛠️ Type of Change

Please check the relevant options:

• Bug fix (non-breaking change that resolves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change unexpectedly)
• New script (a fully functional and thoroughly tested script or set of scripts)

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✅ Prerequisites

The following steps must be completed for the pull request to be considered:

• Self-review performed (I have reviewed my code to ensure it follows established patterns and conventions.)
• Testing performed (I have thoroughly tested my changes and verified expected functionality.)
• Documentation updated (I have updated any relevant documentation)

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📋 Additional Information (optional)

Hey team 👋 , a quick PR to support on getting started quickly after the Postgresql install.
The command was sourced from the official documentation and running the command gives the following output: