use toolchain version

Author: sean-breen

.github/workflows/vulncheck.yml

@@ -40,7 +40,7 @@ jobs:
         id: get-go-version
         run: |
           echo "Reading from go.mod"
-          GO_VERSION=$(grep '^go ' go.mod | awk '{print $2}')
+          GO_VERSION=$(grep -E "^toolchain " go.mod | awk -F' ' '{print $2}' | tr -d 'go')
           echo "Found $GO_VERSION"
           echo "go-version="$GO_VERSION"" >> $GITHUB_OUTPUT