clear the go module cache

Author: joelanford

.github/workflows/sanity.yaml

@@ -17,6 +17,8 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version-file: "go.mod"
+      - name: Clear the module cache
+        run: go clean -modcache
       - name: Run verification checks
         run: make verify GOFLAGS='-tags=containers_image_openpgp'
   lint: