Update go-task/setup-task action to v2

[kindabot]

This PR contains the following updates:

Package	Type	Update	Change
go-task/setup-task	action	major	v1 → v2

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Release Notes

go-task/setup-task (go-task/setup-task)

v2

Compare Source

• Replaced typed-rest-client with @actions/http-client for GitHub API calls
  to eliminate the Node 24 DEP0169 deprecation warning about url.parse().
• Modernized the TypeScript tooling stack (vitest, oxlint, @actions/core@2,
  @actions/io@2, updated @types/node, @vercel/ncc, prettier, etc.).
• Migrated the project to ESM (sources + bundle). Aligns with the new
  @actions/* ESM-only majors and produces a ~47% smaller dist/index.js.
• Upgraded @actions/core 2 → 3, @actions/http-client 2 → 4,
  @actions/io 2 → 3, @actions/tool-cache 2 → 4, typescript 5 → 6, and
  markdownlint-cli 0.47 → 0.48.

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