[guidelines] fix obvious guideline violations in 9 file(s)

[github-actions]

Summary

This PR fixes the GitHub emoji shortcode guideline violation in 9 side-quest workshop files.

The guideline states:

Write checkpoint headings as ## :white_check_mark: Checkpoint so they use the same browser-independent rendering as other icons.

All 9 files used the raw Unicode ✅ character instead of the :white_check_mark: shortcode.

Files changed

File	Fix applied
workshop/side-quest-13-03-pr-checklist-pattern.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-13-04-token-optimization.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-15-01-expressions-and-contexts.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-15-02-chaining-conditions.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-16-01-github-output.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-16-02-secrets-and-permissions.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-16-03-token-exfiltration.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-16-04-deterministic-vs-agentic-data-ops.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint
workshop/side-quest-16-05-long-lived-credentials.md	## ✅ Checkpoint → ## :white_check_mark: Checkpoint

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• awmgmcpg

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "awmgmcpg"

See Network Configuration for more information.

Generated by 📋 Guidelines Enforcer · 40 AIC · ⌖ 6.9 AIC · ⊞ 6.5K · ◷

• expires on Aug 28, 2026, 4:11 AM UTC