chore: rename PORTAINER_WEBHOOK_URL to DOCKER_REDEPLOY_WEBHOOK_URL

More generic name, not tied to Portainer specifically.
Also update dolgolyov-git-release-publisher skill.

gitea-python-ci-cd.md

@@ -561,12 +561,12 @@ CMD ["uvicorn", "your_package.main:app", "--host", "0.0.0.0", "--port", "8080"]
   if: steps.docker-login.outcome == 'success'
   continue-on-error: true  # Optional — webhook may not be configured
   run: |
-    if [ -n "${{ secrets.PORTAINER_WEBHOOK_URL }}" ]; then
+    if [ -n "${{ secrets.DOCKER_REDEPLOY_WEBHOOK_URL }}" ]; then
       echo "Triggering Portainer redeploy..."
-      curl -sf -X POST "${{ secrets.PORTAINER_WEBHOOK_URL }}" \
+      curl -sf -X POST "${{ secrets.DOCKER_REDEPLOY_WEBHOOK_URL }}" \
         --max-time 30 || echo "::warning::Portainer webhook failed"
     else
-      echo "PORTAINER_WEBHOOK_URL not set — skipping auto-deploy"
+      echo "DOCKER_REDEPLOY_WEBHOOK_URL not set — skipping auto-deploy"
     fi
 ```
 
@@ -580,7 +580,7 @@ Each stack has its own unique webhook URL generated in the Portainer UI.
 **Setup:**
 
 1. In Portainer, open your stack → **Webhooks** → enable and copy the URL
-2. In Gitea, go to repo **Settings → Secrets** → add `PORTAINER_WEBHOOK_URL`
+2. In Gitea, go to repo **Settings → Secrets** → add `DOCKER_REDEPLOY_WEBHOOK_URL`
 3. The CI step above calls the webhook after `docker push` — Portainer pulls
    the new image and recreates the container
 
@@ -589,7 +589,7 @@ Each stack has its own unique webhook URL generated in the Portainer UI.
 - The webhook URL itself acts as authentication — no extra token needed
 - The step uses `continue-on-error: true` so missing webhooks don't fail the build
 - Each service/stack gets its own webhook — one secret per repo
-- If `PORTAINER_WEBHOOK_URL` is not set, the step is silently skipped
+- If `DOCKER_REDEPLOY_WEBHOOK_URL` is not set, the step is silently skipped
 
 ### Docker Network on TrueNAS