Use versioned Docker image

Author: ankane

engine/servers/pgvector-single-node/docker-compose.yaml

@@ -3,7 +3,7 @@ version: '3.7'
 services:
   pgvector:
     container_name: pgvector
-    image: pgvector/pgvector:pg16
+    image: pgvector/pgvector:0.6.0-pg16
     environment:
       - POSTGRES_DB=postgres
       - POSTGRES_USER=postgres