ci: test with -race

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

.github/workflows/ci.yaml

@@ -34,4 +34,4 @@ jobs:
           go install github.com/containerd/ltag@latest \
           && ./scripts/validate/fileheader
       - name: Test
-        run: go test -v ./...
+        run: go test -race -v ./...