build(deps): bump n8nio/n8n from 2.21.2 to 2.21.7 in /docker/home/n8n

Bumps n8nio/n8n from 2.21.2 to 2.21.7.

---
updated-dependencies:
- dependency-name: n8nio/n8n
  dependency-version: 2.21.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

docker/home/n8n/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   n8n:
-    image: docker.n8n.io/n8nio/n8n:2.21.2
+    image: docker.n8n.io/n8nio/n8n:2.21.7
     environment:
       - TZ=Europe/Paris
       - N8N_SECURE_COOKIE=false