docs: fix broken quoting in postfix_files defaults

[tmzullinger]

The comment added to defaults/main.yml for postfix_files in 73b7c72 (Added postfix_files feature as a simple means to add extra files/maps to the postfix config, 2024-06-09) included unneeded quotes. One of them was unclosed. Rather than add the closing quote, drop them to match the example provided in README.md.

Adjust the address used in the content field of the README.md example to match what's used elsewhere in the examples. The commented variable in defaults and the README now contain the same data.

Summary by CodeRabbit

• Documentation
  • Updated example configuration entries for postfix_files and optional Postfix maps
  • Refined formatting and placeholder examples in documented code snippets

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates example configuration values and formatting in the Postfix Ansible role documentation. The sender_canonical_maps example in README is changed from mapping to info@example.com to user@example.com, and commented Postfix map examples in defaults are reformatted for consistency.

Changes

Documentation and example updates

Layer / File(s)	Summary
Example configuration updates README.md, defaults/main.yml	Updated sender_canonical_maps example mapping value in README from info@example.com to user@example.com. Reformatted commented Postfix map examples in defaults for sasl_passwd and sender_canonical_maps with adjusted quoting and placeholder formatting.

🚥 Pre-merge checks | ✅ 4 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Description Format	⚠️ Warning	PR description lacks required template sections: missing "Enhancement:" or "Feature:", "Reason:", and "Result:" labels as defined in .github/pull_request_template.md	Reformat description to include: Enhancement: (what changed), Reason: (why), Result: (outcome), and optional Issue Tracker Tickets sections.
Description check	❓ Inconclusive	The description provides detailed context but doesn't follow the required template structure with Enhancement/Reason/Result sections.	Restructure the description to follow the template: Enhancement (what was fixed), Reason (why), and Result (expected outcome).

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The PR title 'docs: fix broken quoting in postfix_files defaults' follows the Conventional Commits format with a valid 'docs' type and clearly describes the main change: fixing quoting issues in postfix_files documentation.

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