Update Fedora installation command to include rake

[fdmarcin]

Add missing dependency for Fedora. Tested on Fedora 43.

Proposed change

Type of change

• Document existing features within Home Assistant
• Document new or changing features for which there is an existing pull request elsewhere
• Spelling or grammatical corrections, or rewording for improved clarity
• Changes to the backend of this documentation
• Remove stale or deprecated documentation

Add missing part of an instruction.

Checklist

• I have read and followed the documentation guidelines.
• I have verified that my changes render correctly in the documentation.

Additional information

• This PR fixes or closes issue: fixes #
• Link to relevant existing code or pull request:

Summary by CodeRabbit

• Documentation
  • Updated Fedora Ruby installation instructions to include additional development tooling, ensuring correct setup when following the getting started guide.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 9c15fba6-f304-4875-806b-5ec434e5e2d7

📥 Commits

Reviewing files that changed from the base of the PR and between 974c323 and 551f329.

📒 Files selected for processing (1)

• docs/documenting.md

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📝 Walkthrough

Walkthrough

Adds rubygem-rake to the Fedora-specific Ruby installation command in the documenting guide. This extends the set of Ruby development tools installed via dnf before running bundle.

Changes

Cohort / File(s)	Summary
Documentation docs/documenting.md	Added rubygem-rake to the Fedora Ruby install command to include additional Ruby development tooling.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: adding rake to the Fedora installation command documentation.
Description check	✅ Passed	The description includes the essential context (tested on Fedora 43) but lacks completion in the Proposed change section and is missing verification confirmation.
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
• Post copyable unit tests in a comment

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