chore(deps): update openresty/openresty docker tag to v1.21.4.3 (#589)

* chore(deps): update openresty/openresty docker tag to v1.21.4.3

* Update app version [skip ci]

---------

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

openresty/1.21.4.3-0-focal/docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3'
 services:
   openresty:
-    image: openresty/openresty:1.21.4.2-0-focal
+    image: openresty/openresty:1.21.4.3-0-focal
     container_name: ${CONTAINER_NAME}
     restart: always
     network_mode: host