Update docker-compose.yml

Author: daavoo

tests/docker-compose.yml

@@ -2,7 +2,7 @@
 version: '3.2'
 services:
   git-server:
-    image: ghcr.io/linuxserver/openssh-server
+    image: ghcr.io/linuxserver/openssh-server:9.0_p1-r2-ls100
     environment:
       - USER_NAME=user
       - PUBLIC_KEY_FILE=/tmp/key