Update testing.yml

Author: ije

.github/workflows/testing.yml

@@ -34,7 +34,7 @@ jobs:
           version: latest
 
       - name: Deno test
-        run: deno test -A --unstable --location=http://localhost -c=./deno.json --import-map=./import_map.json
+        run: deno test -A --unstable --location=http://localhost --config=./deno.json --import-map=./import_map.json
 
       - name: Cargo test
         run: cd compiler && cargo test --all