🔧 fix: bump DAGGER_VERSION 0.20.6 → 0.20.8 in CI workflows

[yeazelm]

Summary

• The CLI installed by dagger-for-github no longer round-trips cleanly with the current daggerverse modules at v0.20.6. The version handshake fails before dagger call reaches user code.
• Bumps DAGGER_VERSION to 0.20.8 across the workflows, matching the rest of the org repos (e.g. paper PR #40) that have already moved.

Refs PCC-543

Test plan

• CI / PR / release workflows pass on this PR

[linear-code]

PCC-543

[greptile-apps]

Greptile Summary

Bumps DAGGER_VERSION from 0.20.6 to 0.20.8 in the PR workflow to resolve a CLI/daggerverse module version handshake failure introduced at 0.20.6.

• .github/workflows/pr.yaml: single-line change updating the DAGGER_VERSION env var used by both check-pr-title and check-linear-magic-word jobs via the dagger/dagger-for-github@v8.2.0 action.

Confidence Score: 5/5

Safe to merge — the only change is a one-line version bump that restores CI compatibility with current daggerverse modules.

The change is a single-line version bump with no logic, structural, or security implications. Both jobs in the workflow continue to reference the same DAGGER_VERSION env var, and the version aligns with what other org repos already use successfully.

No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/pr.yaml	Single-line version bump of DAGGER_VERSION from 0.20.6 to 0.20.8; no structural changes to the workflow.

Sequence Diagram

sequenceDiagram
    participant GH as GitHub Actions
    participant DA as dagger/dagger-for-github@v8.2.0
    participant CLI as Dagger CLI (0.20.8)
    participant DV as daggerverse/ghcontrib

    GH->>DA: Install Dagger version 0.20.8
    DA-->>GH: CLI ready
    GH->>CLI: dagger call -m ghcontrib check-pull-request
    CLI->>DV: Module handshake (0.20.8)
    DV-->>CLI: OK
    CLI-->>GH: result
    GH->>CLI: dagger call -m ghcontrib check-pull-request-linear-magic-word
    CLI->>DV: Module handshake (0.20.8)
    DV-->>CLI: OK
    CLI-->>GH: result

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_{Reviews (1): Last reviewed commit: "🔧 fix: bump DAGGER_VERSION 0.20.6 → 0.2..." | Re-trigger Greptile}