chore(deps): update lscr.io/linuxserver/heimdall docker tag to v2.6.3

docker-compose/heimdall/compose.yaml

@@ -1,7 +1,7 @@
 ---
 services:
   heimdall:
-    image: lscr.io/linuxserver/heimdall:2.6.2
+    image: lscr.io/linuxserver/heimdall:2.6.3
     container_name: heimdall
     environment:
       - PUID=1000