ci: drop containers feature on Windows (bollard connect_with_unix is Unix-only)

Author: zoza1982

.github/workflows/release.yml

@@ -49,9 +49,12 @@ jobs:
         include:
           # Windows x86_64 (MSVC). (Temporary branch: matrix trimmed to Windows-only to produce a
           # test binary quickly; the full cross-platform matrix lives on `main`.)
+          # NOTE: `containers` (Docker/bollard) does not build on Windows — it calls the Unix-only
+          # `connect_with_unix`. Dropped here so the binary still ships local + SSH + S3/GCS/Azure +
+          # archive, which is what the Backblaze/copy testing needs.
           - os: windows-latest
             target: x86_64-pc-windows-msvc
-            features: all-backends
+            features: ssh,cloud,archive
             archive: zip
     steps:
       - uses: actions/checkout@v7