Use node image for Snyk (#379)

Author: frederikprijck

.github/workflows/snyk.yml

@@ -42,6 +42,6 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha || github.ref }}
 
-      - uses: snyk/actions/php@b98d498629f1c368650224d6d212bf7dfa89e4bf # pin@0.4.0
+      - uses: snyk/actions/node@b98d498629f1c368650224d6d212bf7dfa89e4bf # pin@0.4.0
         env:
           SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}