docs: fix grammar and formatting issues in Key Concepts

[AayeshaF]

This commit fixes minor grammar and formatting issues in the Key Concepts section:

1. Corrected subject-verb agreement in API Resource section:

   • "An API Resource has a set of HTTP methods that operates on it." → "An API Resource has a set of HTTP methods that operate on it."

2. Fixed formatting in API Visibility section (removed "."):

   • "Restricted by role. - Visible only to the users under the creator's tenant domain..." → "Restricted by role - Visible only to the users under the creator’s tenant domain..."

3. Replaced dash with colon in Rate Limits section:

   • "Rate limiting can be useful to -" → "Rate limiting can be useful to:"

No functional changes were made.

Purpose

Fix minor grammar and formatting issues in Key Concepts section of WSO2 API Manager documentation.

Goals

Improve clarity and readability of the documentation; no functional changes.

Approach

Directly edited the Markdown file key-concepts.md in the get-started folder of the documentation.

User stories

N/A

Release note

Documentation-only change; no release note required.

Documentation

This PR is the documentation update for the Key Concepts page.

Training

N/A

Certification

N/A

Marketing

N/A

Automation tests

N/A, documentation change only.

Security checks

• Followed secure coding standards: N/A
• Ran FindSecurityBugs plugin and verified report: N/A
• Confirmed no secrets committed: yes

Samples

N/A

Related PRs

N/A

Migrations (if applicable)

N/A

Test environment

N/A

Learning

N/A

Summary by CodeRabbit

• Documentation
  • Minor grammar corrections and punctuation improvements throughout the API documentation.
  • Enhanced formatting consistency and list presentation standards in the key concepts guide, with refinements to API resource path descriptions, HTTP methods definitions, API visibility section, and rate limits entry formatting for improved readability, clarity, and consistency across all documentation materials.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

Minor textual and markdown formatting updates to the key concepts documentation. Grammar corrections applied ("operates on it" to "operate on it") and markdown list formatting standardized across API Visibility and Rate Limits entries for consistency.

Changes

Cohort / File(s)	Summary
Documentation Updates en/docs/get-started/key-concepts.md	Grammar correction in HTTP Methods entry; markdown formatting adjustments in API Visibility bullets and Rate Limits list introduction for consistency.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

✨ A dash removed, a comma placed just right,
Grammar polished to shine so bright,
Lists now align in perfect array,
Documentation blooms in every way! 🐰

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: fixing grammar and formatting issues in the Key Concepts documentation.
Description check	✅ Passed	The description covers all essential sections of the template with appropriate content for a documentation-only fix, clearly explaining the changes made.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into master

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