Update azd extension registry to publish microsoft.azd.waza v0.38.4

[Copilot]

The extension registry served from main was stale and resolved azd ext install microsoft.azd.waza to 0.37.0 instead of the current 0.38.4. This PR updates the registry metadata so azd can resolve the latest published extension release.

• Registry version bump

  • Added a new 0.38.4 version object under extensions[id="microsoft.azd.waza"].versions.

• Release artifact metadata

  • Added all six platform artifacts (darwin/linux/windows × amd64/arm64) for 0.38.4.
  • Included release download URLs under tag azd-ext-microsoft-azd-waza_0.38.4.
  • Included SHA256 checksums for each artifact in the existing registry schema format.

• No behavioral/code-path changes

  • Change is limited to registry.json data used by azd extension resolution.

{
  "version": "0.38.4",
  "artifacts": {
    "linux/amd64": {
      "checksum": {
        "algorithm": "sha256",
        "value": "7a24669309386aa60d2f35754c6d209d1a1cbd4182353959b72cff1e6bc540eb"
      },
      "url": "https://github.com/microsoft/waza/releases/download/azd-ext-microsoft-azd-waza_0.38.4/microsoft-azd-waza-linux-amd64.tar.gz"
    }
  }
}

• Fixes Update registry.json for Waza 0.38.4 #505

[Copilot]

Copilot wasn't able to review any files in this pull request.

[Copilot]

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0 new
• Review effort level: Lite