setting version for containerd nightly package to 1.7.0+unknown so we can differenite between v1.6 and v1.7 in tests (#228)

Signed-off-by: Mark Rossetti <[email protected]>

Author: marosset

.github/workflows/windows-containerd-nightly.yml

@@ -37,6 +37,7 @@ jobs:
       env:
         GOOS: windows
         GOARCH: amd64
+        VERSION: v1.7.0+unknown
       run: |
         git clone https://github.com/containerd/containerd.git
         cd containerd