Update Ruby version from 4.0.2 to 4.0.4

[RalphHightower]

Pull Request/Issue Number: N/A

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🚨 Jekyll Pre‑Merge Verification

• Title correct
• Tags assigned
• Categories assigned
• Date correct (no accidental future dates)
• Front matter is valid YAML
• Liquid used only where required (stock‑quote posts)

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Pull Request Type

Select one (one PR per change):

• New blog post(s)
• Bugfix(es)
• Code change(s)
• HTML / Jekyll / Liquid / Markdown change(s)
• Build error(s)
• Documentation
• Refactor (no functional changes)
• Security
• Templates
• Other (describe):

Reason for Change

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Current Behavior

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New Behavior

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Files Added

Files Modified

Files Deleted

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Environment

Languages

• APL
• awk
• C / C++ / C#
• Fortran
• HTML
• Java
• Javascript
• Jekyll
• Liquid
• Markdown
• Ruby
• SNOBOL
• YAML
• Other:

Operating Systems

• Android
• Linux
• Unix
• Solaris
• Windows

Hardware

Expand hardware list

• ARM
• DEC PDP‑8
• DEC PDP‑11
• DEC VAX
• DEC VAXStation
• IBM
• IBM System/360
• IBM System/370
• IBM System/370-XA
• IBM ESA/370
• IBM z/Architecture
• Intel 8080
• Intel Core
• Motorola 68000
• Raspberry Pi
• RISC‑V
• Sun SPARCStation

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Other Information

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Clean Exit

• Branch will be deleted after merge
• No overlapping PRs for this repo
• One change per branch

Build Status

• Success (assign 'action – success'). This may be delayed and updated in bulk.
• Partial Success (build succeeded, but not desired result. HTTP 404, etc.)
• Failure (Build failed. Mark status: "action – failed'. Copy build log in comment of this PR. Create Issue from Comment, click on '…', 'reference in new issue' with PR#{pull request number} as subject.
• Canceled (flag PR as 'action – canceled')

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Branch Lifecycle

• This branch is single‑purpose
• No overlapping PRs for this repo

Scope of Change

• Number of files touched:
• Why these files belong together:

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None