docs: update git ref (#2)

## pre-merge todos
- [x] #3 

## what
- Update readme with new github repo url

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Documentation**
- Updated the README to clarify the repository's purpose and updated
example usage to reference the correct module source.
  - Updated the license file to reflect the year 2025.

- **Chores**
- Simplified the GitHub Actions workflow for testing by switching to a
composite action and updating the event trigger.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: westonplatter

LICENSE

@@ -187,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2024 Masterpoint
+   Copyright 2025 Masterpoint
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

README.md

@@ -8,7 +8,7 @@
 
 ## Purpose and Functionality
 
-This repository serves as a child module for managing Postgres Logical Databases and Roles
+This repository serves as a [child module](https://opentofu.org/docs/language/modules/#child-modules) for managing Postgres Logical Databases, Users, and Roles.
 
 ## Usage
 
@@ -33,7 +33,7 @@ provider "postgresql" {
 }
 
 module "postgres_automation" {
-  source = "git::https://github.com/masterpointio/terraform-postgres-automation.git?ref=main"
+  source = "git::https://github.com/masterpointio/terraform-postgres-config-dbs-users-roles.git?ref=main"
 
   databases = [
     {