Update deployment CI job

Author: jb3

.github/workflows/docker-publish.yml

@@ -53,6 +53,7 @@ jobs:
       - name: Deploy to Kubernetes
         uses: Azure/k8s-deploy@v1
         with:
+          namespace: web
           manifests: |
               deployment.yaml
           images: 'ghcr.io/python-discord/public-stats:${{ steps.sha_tag.outputs.tag }}'