Fix typo in architectural basics introduction

[FDMJ]

Purpose of this pull request

This pull request (PR) corrects a typo in the introduction of the architectural basics section.

Affected pages

• https://developer.adobe.com/commerce/php/architecture/basics/

[github-actions]

🔍 Linter Report

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                     LINTER REPORT
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Generated: 2026-09-22T19:11:30.395Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-php/commerce-php
Skipped Rules:
  - check-frontmatter → src/pages/includes

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Files to process: 1


═══════════════════════════════════════════════════════════════
                        SUMMARY
═══════════════════════════════════════════════════════════════

  📁 Files processed:    1
  📄 Files with issues:  0
  ❌ Total errors:       0
  ⚠️  Total warnings:     0
  📋 Total issues:       0

Result: ✅ PASSED - All files passed linting successfully!

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This comment was automatically generated by the linter bot.

[dshevtsov]

@FDMJ thank you for your contribution. Please sign the Adobe CLA to pass the required check and get this fix merged.

[github-actions]

🔍 Linter Report

Click to expand full report

═══════════════════════════════════════════════════════════════
                     LINTER REPORT
═══════════════════════════════════════════════════════════════

Generated: 2026-09-23T15:00:54.870Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-php/commerce-php
Skipped Rules:
  - check-frontmatter → src/pages/includes

───────────────────────────────────────────────────────────────

Files to process: 1


═══════════════════════════════════════════════════════════════
                        SUMMARY
═══════════════════════════════════════════════════════════════

  📁 Files processed:    1
  📄 Files with issues:  0
  ❌ Total errors:       0
  ⚠️  Total warnings:     0
  📋 Total issues:       0

Result: ✅ PASSED - All files passed linting successfully!

═══════════════════════════════════════════════════════════════

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This comment was automatically generated by the linter bot.

[github-actions]

🔍 Linter Report

Click to expand full report

═══════════════════════════════════════════════════════════════
                     LINTER REPORT
═══════════════════════════════════════════════════════════════

Generated: 2026-09-23T15:03:19.808Z
Mode: Full Linting (all rules + dead links check)
Target Directory: /home/runner/work/commerce-php/commerce-php
Skipped Rules:
  - check-frontmatter → src/pages/includes

───────────────────────────────────────────────────────────────

Files to process: 1


═══════════════════════════════════════════════════════════════
                        SUMMARY
═══════════════════════════════════════════════════════════════

  📁 Files processed:    1
  📄 Files with issues:  0
  ❌ Total errors:       0
  ⚠️  Total warnings:     0
  📋 Total issues:       0

Result: ✅ PASSED - All files passed linting successfully!

═══════════════════════════════════════════════════════════════

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This comment was automatically generated by the linter bot.