Update github action and expose core lokalise project id (#2504)

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.github/workflows/download_localized_strings.yml

@@ -37,6 +37,7 @@ jobs:
         env:
           HOMEASSISTANT_LOKALIZE_PROJECT_ID: ${{ secrets.HOMEASSISTANT_LOKALIZE_PROJECT_ID }}
           HOMEASSISTANT_LOKALIZE_PROJECT_FRONTEND: ${{ secrets.HOMEASSISTANT_LOKALIZE_PROJECT_FRONTEND }}
+          HOMEASSISTANT_LOKALIZE_PROJECT_CORE: ${{ secrets.HOMEASSISTANT_LOKALIZE_PROJECT_CORE }}
           HOMEASSISTANT_LOKALIZE_TOKEN: ${{ secrets.LOKALISE_TOKEN }}
 
       - name: Commit changes