fix: pin windows release runner to vs2026 image (#24)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/release.yml

@@ -51,7 +51,7 @@ jobs:
             target: aarch64-apple-darwin
             asset_suffix: darwin-arm64
             binary_name: gh-pilot
-          - os: windows-latest
+          - os: windows-2025-vs2026
             target: x86_64-pc-windows-msvc
             asset_suffix: windows-amd64.exe
             binary_name: gh-pilot.exe