fix: bump agraph image to v8.1.1 (#249)

The v8.1.0 tag was removed from Docker Hub, causing CI to fail with
"manifest unknown" when pulling the agraph-ut container.

Signed-off-by: Mohamed El Amine BOUKERFA <boukerfa.ma@gmail.com>

Author: maboukerfa

docker-compose.yml

@@ -65,7 +65,7 @@ services:
 
 
   agraph-ut:
-    image: franzinc/agraph:v8.1.0
+    image: franzinc/agraph:v8.1.1
     platform: linux/amd64
     environment:
       - AGRAPH_SUPER_USER=test