Remove blog link from ROADMAP.md

[MicalLee0415]

Removed the blog link from the roadmap.

Summary

Describe the problem and fix in 2–5 bullets:

• Problem:
• Why it matters:
• What changed:
• What did NOT change (scope boundary):

Change Type (select all)

• Bug fix
• Feature
• Refactor
• Docs
• Security hardening
• Chore/infra

Scope (select all touched areas)

• Core shell / PTY (src/aish/shell*.py, src/aish/shell_enhanced/)
• AI agent / LLM (src/aish/agents.py, src/aish/llm.py, src/aish/prompts.py)
• Skills / Tools (src/aish/skills/, src/aish/tools/, debian/skills/)
• Security / Risk assessment (src/aish/security/)
• Sandbox (src/aish/sandboxd.py, src/aish/security/sandbox*.py)
• Configuration / Wizard (src/aish/config.py, src/aish/wizard/)
• CLI / Interface (src/aish/cli.py, src/aish/help_manager.py)
• I18N (src/aish/i18n/)
• Observability (src/aish/logging_utils.py, src/aish/session_store.py)
• Packaging / Installation (aish.spec, build.sh, debian/)
• CI/CD / Infra (.github/)
• Documentation (docs/, *.md)

Linked Issue/PR

• Closes #
• Related #

User-visible / Behavior Changes

List user-visible changes (including defaults/config).
If none, write None.

Security Impact (required)

• New security risk levels or policy changes? (Yes/No)
• Secrets/tokens handling changed? (Yes/No)
• New/changed network calls (LLM providers)? (Yes/No)
• Command execution surface changed? (Yes/No)
• Sandbox isolation changed? (Yes/No)
• Data access scope changed? (Yes/No)
• If any Yes, explain risk + mitigation:

Repro + Verification

Environment

• OS:
• Python version:
• Model/provider tested:
• Install method (deb/built from source/uv run):

Steps

Expected

Actual

Evidence

Attach at least one:

• Failing test/log before + passing after
• Test output (pytest)
• Log snippets (~/.config/aish/logs/aish.log)
• Screenshot/recording

Human Verification (required)

What you personally verified (not just CI), and how:

• Verified scenarios:
• Edge cases checked:
• What you did not verify:

Compatibility / Migration

• Backward compatible? (Yes/No)
• Config changes? (Yes/No - if yes, describe migration)
• Security policy changes? (Yes/No - if yes, describe impact)
• If migration needed, exact steps:

Failure Recovery (if this breaks)

• How to disable/revert this change quickly:
• Files/config to restore:
• Known bad symptoms reviewers should watch for:

Risks and Mitigations

List only real risks for this PR. Add/remove entries as needed. If none, write None.

• Risk:
  • Mitigation: