Update linuxserver/speedtest-tracker Docker tag to v1.12.3 (#711)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ansible/playbooks/speedtest-tracker/docker-compose.yml

@@ -18,7 +18,7 @@ services:
     volumes:
       - ./speedtest-app:/config
       - "./web:/etc/ssl/web"
-    image: linuxserver/speedtest-tracker:1.12.2
+    image: linuxserver/speedtest-tracker:1.12.3
     restart: unless-stopped
     depends_on:
       - speedtest-db