workflows: replace Plausible with Umami in fly.io deployment

Signed-off-by: JmPotato <github@ipotato.me>

Author: JmPotato

.github/workflows/fly-deploy.yml

@@ -16,7 +16,7 @@ jobs:
       - env:
           FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
           MYSQL_CONNECTION_URL: ${{ secrets.MYSQL_CONNECTION_URL }}
-          PLAUSIBLE_DOMAIN: ${{ secrets.PLAUSIBLE_DOMAIN }}
+          UMAMI_ID: ${{ secrets.UMAMI_ID }}
         run: |
-          flyctl secrets set --stage MYSQL_CONNECTION_URL=${MYSQL_CONNECTION_URL} PLAUSIBLE_DOMAIN=${PLAUSIBLE_DOMAIN}
+          flyctl secrets set --stage MYSQL_CONNECTION_URL=${MYSQL_CONNECTION_URL} UMAMI_ID=${UMAMI_ID}
           flyctl deploy --remote-only