Update actions/checkout action to v6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 -> v6

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

v5

Compare Source

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Configuration

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[greptile-apps[bot]]

Greptile Overview

Greptile Summary

Updated actions/checkout from v4 to v6 across all GitHub workflow files.

• Version 5 updated the action to use Node.js 24
• Version 6 changes how credentials are persisted (now stored in a separate file)
• All workflow configurations remain unchanged except for the version bump
• No breaking changes affect existing usage patterns in these workflows

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• This is a routine dependency update managed by Renovate bot. The changes only update version numbers from v4 to v6. According to the changelog, v5 updated to Node.js 24 and v6 changed credential persistence implementation, but both maintain backward compatibility with existing usage patterns. No workflow logic or parameters were modified.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
.github/workflows/ci.yml	5/5	Updated actions/checkout from v4 to v6 for CI workflow
.github/workflows/coana-analysis.yml	5/5	Updated actions/checkout from v4 to v6 for vulnerability analysis workflow
.github/workflows/coana-guardrail.yml	5/5	Updated two instances of actions/checkout from v4 to v6 for guardrail workflow
.github/workflows/fix-latest.yml	5/5	Updated actions/checkout from v4 to v6 for npm tag management workflow
.github/workflows/release.yml	5/5	Updated actions/checkout from v4 to v6 for npm release workflow

Sequence Diagram

sequenceDiagram
    participant GHA as GitHub Actions
    participant Checkout as actions/checkout@v6
    participant Runner as Workflow Runner
    participant Repo as Repository

    Note over GHA,Repo: CI Workflow
    GHA->>Checkout: Trigger checkout action
    Checkout->>Repo: Clone repository
    Repo-->>Checkout: Repository files
    Checkout-->>Runner: Files available
    Runner->>Runner: Run tests, lint, build

    Note over GHA,Repo: Release Workflow
    GHA->>Checkout: Trigger checkout action
    Checkout->>Repo: Clone repository
    Repo-->>Checkout: Repository files
    Checkout-->>Runner: Files available
    Runner->>Runner: Run tests & publish to NPM

    Note over GHA,Repo: Coana Guardrail Workflow
    GHA->>Checkout: Checkout base branch
    Checkout->>Repo: Clone base branch
    Repo-->>Runner: Base branch files
    Runner->>Runner: Run Coana analysis on base
    Runner->>Runner: Reset file permissions
    GHA->>Checkout: Checkout PR branch
    Checkout->>Repo: Clone PR branch
    Repo-->>Runner: PR branch files
    Runner->>Runner: Run Coana analysis on PR
    Runner->>Runner: Compare reports