[aw] Apply workflow upgrade for prompt-optimization action pin

[Copilot]

This updates the repository to the latest available agentic-workflow action pin where an upgrade was available. The change is limited to the prompt-optimization workflow source and its generated lock file.

• Workflow source update

  • Bumped ai-action/setup-ollama in .github/workflows/prompt-optimization.md to the newer pinned commit (v2.0.74).

• Compiled lock synchronization

  • Regenerated .github/workflows/prompt-optimization.lock.yml so workflow metadata/manifest and compiled uses: entries match the upgraded source pin.

• Effective diff shape

  • No functional edits outside prompt-optimization; other workflow files were not included in the final diff.

# .github/workflows/prompt-optimization.md
- uses: ai-action/setup-ollama@0fdcbba8ac63bc9c0e7629cf85f46b77a4ad4072
+ uses: ai-action/setup-ollama@435e3afb7a5b950ac8868a114712baded7616c24  # v2.0.74

• Fixes [aw] Upgrade available #269