Fix grammar and typo in SDG11 workshop documentation

[chandan04042003]

Fixes # .

Changes proposed in this pull request:

Fixes two documentation issues in the SDG11 waterways exercise:

• Adds the missing preposition "on"
• Corrects the typo "wich" to "which"

@pgRouting/admins

Summary by CodeRabbit

• Documentation
  • Clarified that the exercise focuses on mainland areas and corrected a spelling error in the swamp-area description.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: a1b43895-d370-4467-b86d-c08b711a97d4

📥 Commits

Reviewing files that changed from the base of the PR and between 750ff4d and 01377b1.

📒 Files selected for processing (1)

• docs/un_sdg/sdg11-cities.rst

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Walkthrough

The SDG 11 exercise description corrects the phrase “only the areas” to “only on the areas” and fixes the spelling of “which.” It still refers to mainland areas and swamp rivers for removal.

Changes

SDG 11 exercise description

Layer / File(s)	Summary
Exercise description wording docs/un_sdg/sdg11-cities.rst	The text changes “only the areas” to “only on the areas” and corrects “wich” to “which.” The description still identifies mainland areas and swamp rivers for removal.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other · Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to 01377

No material behavior or documentation-contract risk remains; the exercise scope is unchanged.

Architecture Summary

Architecture risk: 🔵 Low · up to 01377

The change affects 1 system.

Changed systems: docs

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — docs (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in docs/un_sdg/sdg11-cities.rst: The description changes “only the areas” to “only on the areas” and corrects “wich” to “which”; it still identifies mainland areas and swamp rivers for removal.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 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 two documentation edits in the pull request: a grammar fix and a typo correction in the SDG11 workshop documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

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_{A rabbit reads the wording anew,
And spots a small spelling fix, too.
Mainland areas stay in the line,
Swamp rivers remain by design.
With clearer words, the page is through.}

_{Comment @coderabbitai help to get the list of available commands.}

[chandan04042003]

@cvvergara can you please review this pr, and guide me in the next steps!