chore(deps): update louislam/uptime-kuma docker tag to v1.21.3 (#119)

* chore(deps): update louislam/uptime-kuma docker tag to v1.21.3

* Update app version

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-action update-app-version <githubaction@githubaction.com>

apps/uptime-kuma/1.21.3/docker-compose.yml

@@ -2,7 +2,7 @@
 version: '3'
 services:
   uptime-kuma:
-    image: louislam/uptime-kuma:1.20.2
+    image: louislam/uptime-kuma:1.21.3
     container_name: ${CONTAINER_NAME}
     restart: always
     networks: