fix: correct indentation for extra environmental variable examples

[weeix]

What this PR does / why we need it

This PR corrects a critical indentation error within the example configuration for webhook.extraEnv in both README.md and charts/n8n/values.yaml.

The previous indentation for the commented-out value field of the example WEBHOOK_URL would result in an invalid YAML structure if a user simply uncommented the lines, leading to potential misconfiguration or chart failures.

Before:

   #   WEBHOOK_URL:
-  #   value: "http://webhook.domain.tld"

After:

   #   WEBHOOK_URL:
+  #     value: "http://webhook.domain.tld"

The corrected indentation aligns the value key properly under the WEBHOOK_URL map.

Which issue this PR fixes

Special notes for your reviewer

This is a minor but important fix to ensure the YAML syntax is correct for users who rely on the examples in values.yaml and README.md. No functional code changes were made.

Checklist

Please place an 'x' in all applicable fields and remove unrelated items.

Version and Documentation

• Chart version updated in Chart.yaml following semantic versioning
• App version updated in Chart.yaml if applicable
• artifacthub.io/changes section updated in Chart.yaml (see ArtifactHub annotation reference)
• Variables are documented in the README.md (Corrects formatting in documentation/examples)

Testing and Validation

• Ran ah lint locally without errors (A YAML syntax fix is covered by linting)
• Ran Chart-Testing: ct lint --chart-dirs charts/n8n --charts charts/n8n --validate-maintainers=false
• Tested chart installation locally
• Tested with example configurations in /examples directory

Summary by CodeRabbit

• Documentation
  • Improved readability by adjusting indentation in commented configuration examples related to webhook environment variables.
• Style
  • Standardized indentation of commented configuration lines in chart values for consistent formatting and alignment.
• Chores
  • Minor formatting cleanup to maintain consistency across configuration references.
• Notes
  • No functional or behavioral changes; this update does not affect runtime behavior or user workflows.

[coderabbitai]

Walkthrough

Cosmetic indentation adjustments were made to commented lines related to webhook extraEnv/WEBHOOK_URL in README.md and charts/n8n/values.yaml. No configuration, behavior, or functional logic was changed.

Changes

Cohort / File(s)	Summary
Documentation README.md	Adjusted indentation in two commented lines under webhook extraEnv; no semantic or config changes.
Helm values charts/n8n/values.yaml	Minor indentation change in commented WEBHOOK_URL line within webhook.extraEnv; alignment only, no functional impact.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title clearly and concisely describes the primary change of correcting indentation for extra environment variable examples, matching the actual modifications in both README.md and values.yaml without extraneous detail.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ec66f7c and 1dacaa7.

📒 Files selected for processing (2)

• README.md (1 hunks)
• charts/n8n/values.yaml (1 hunks)

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