Update README generation to use correct description variable

[marko-stanojevic]

Description

This pull request primarily updates the .github/README_template.md file to improve clarity, consistency, and formatting for users of the PowerShell module template. It also makes minor improvements to the repository bootstrapping workflow. The most important changes are grouped below.

README Template Improvements

• Standardized markdown formatting for code blocks, tables, and lists throughout the README, making instructions easier to follow and improving overall readability. [1] [2] [3] [4]
• Reorganized and clarified step-by-step instructions for setup, testing, function creation, and contribution, ensuring each process is easy to understand for new users. [1] [2] [3] [4] [5] [6]
• Updated project URLs and references to use {MODULE_PATH} placeholder for better template reusability.
• Removed the detailed "Features in Detail" section to streamline the README and focus on essential usage instructions.
• Improved documentation for CI/CD pipeline and manual release process, including clearer secrets configuration and workflow dispatch instructions. [1] [2] [3]

Workflow and Template Variable Handling

• Fixed the order and assignment of the Description field in the generated module manifest to ensure it uses the repository description from workflow outputs.
• Updated the bootstrap workflow to use sed with pipe delimiters for template variable replacement, improving robustness for values containing slashes.