[preset] Update Agent Parity Governance preset to v0.4.2 - #4110

Updates the agent-parity-governance community preset from v0.4.1 to v0.4.2, submitted by @hindermath in #4109.

Changes

• presets/catalog.community.json: updated version, download_url, documentation, description, and provides.templates (6 → 7, adding agent-parity-governance-model-routing)
• docs/community/presets.md: updated description and template count in the community presets table

Validation Results

All checks passed:

• ✅ Preset ID format: agent-parity-governance matches ^[a-z][a-z0-9-]*$
• ✅ Version format: 0.4.2 is valid semver
• ✅ Repository accessible: https://github.com/hindermath/spec-kit-preset-agent-parity-governance
• ✅ preset.yml present: confirmed at v0.4.2 tag
• ✅ LICENSE present: MIT license confirmed
• ✅ Documentation README: points to README.md at v0.4.2, contains specify preset add --from https://github.com/hindermath/spec-kit-preset-agent-parity-governance/archive/refs/tags/v0.4.2.zip (exact download URL match)
• ✅ Release tag exists: v0.4.2 tag confirmed (fe9e8e1)
• ✅ Download URL format: matches archive/refs/tags/v<version>.zip pattern
• ✅ Checklists: all required checkboxes checked

Closes #4109
cc @hindermath

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