Fix nginx-geoip docker-compose

the docker compose file is failing
due to wrong container image and it
is fixed in this patch.

Signed-off-by: yolossn <nssvlr@gmail.com>

Author: yolossn

examples/nginx-geoip/docker-compose.yaml

@@ -4,7 +4,7 @@ version: '2.4'
 
 services:
   geoip:
-    image: geoip-api:latest
+    image: ghcr.io/observabilitystack/geoip-api:latest
     ports:
       - 8081:8080