docs: fix some more typos

[GauBen]

Description

:)

Checklist

Source code

• I've shared and documented any breaking change
• I've reviewed and updated the jahia-depends

Tests

• I've provided Unit and/or Integration Tests
• I've updated the parent issue with required manual validations

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[Copilot]

Pull Request Overview

This PR fixes documentation formatting issues by updating markdown syntax across multiple documentation files. The changes standardize the documentation format by converting GitHub-style alert syntax to standard markdown admonitions and fixing a broken link reference.

• Convert GitHub-style alert syntax (> [!WARNING], > [!TIP], etc.) to standard markdown admonitions (:::warning, :::info)
• Fix inconsistent link reference in navigation
• Add missing workflow name in GitHub Actions file

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/1-getting-started/5-view-content-in-full-page/README.md	Fix broken link reference to navigation bar section
docs/1-getting-started/3-the-about-us-page/README.md	Convert error message format to proper code block
docs/1-getting-started/2-making-a-hero-section/README.md	Convert GitHub-style alerts to standard markdown admonitions
docs/1-getting-started/1-dev-environment/README.md	Convert GitHub-style alert to standard markdown admonition
.github/workflows/push-docs.yml	Add missing workflow name

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