Per METplus#3247, added upload-artifact

Author: jprestop

.github/workflows/linkcheck.yml

@@ -15,4 +15,5 @@ jobs:
       - uses: dtcenter/metplus-action-linkcheck@v1
         with:
           fail-on-broken-links: 'true'
-          upload-artifact: 'true'
+          upload-artifact: 'true'
+          install-package: 'true'