docs: fix duplicate "the" typo in React quickstart guide

[chamod-malindu]

Purpose

This PR Fixes a typographical error where the word "the" was duplicated in the React quickstart
guide across multiple IS versions.
Resolves #27551

Approach

Removed the duplicate "the" across multiple versions of the react.md guide (next, 7.2.0, 7.1.0, 7.0.0) to ensure consistency and improve readability.

[CLAassistant]

All committers have signed the CLA.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yml

Review profile: CHILL

Plan: Pro

Run ID: 8c2aa861-4e44-4f6a-9a51-cffaeedb5e89

📥 Commits

Reviewing files that changed from the base of the PR and between e7bf2d2 and 0214656.

📒 Files selected for processing (4)

• en/identity-server/7.0.0/docs/get-started/try-your-own-app/react.md
• en/identity-server/7.1.0/docs/get-started/try-your-own-app/react.md
• en/identity-server/7.2.0/docs/get-started/try-your-own-app/react.md
• en/identity-server/next/docs/get-started/try-your-own-app/react.md

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📝 Walkthrough

Walkthrough

Documentation corrections across multiple identity server versions (7.0.0, 7.1.0, 7.2.0, and next) for the React authentication guide. Each change removes a duplicate "the" word in the description of behavior following successful sign-in.

Changes

Cohort / File(s)	Summary
Documentation Updates en/identity-server/*/docs/get-started/try-your-own-app/react.md	Removed duplicate "the" word from the sentence describing navigation after successful signIn() in the React authentication guide across all version branches.

Suggested labels

Team/Authentication & registration

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description covers the purpose and approach, but is missing several required template sections including Test environment and Security checks.	Complete the PR description by adding the missing 'Test environment' and 'Security checks' sections from the template, even if marking them as N/A for documentation-only changes.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: fixing a duplicate 'the' typo in the React quickstart guide documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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