Update Weaviate docker compose version to 1.15.2

Author: antas-marcin

docker-compose.yml

@@ -1,10 +1,10 @@
 version: '3.4'
 services:
   weaviate:
-    image: semitechnologies/weaviate:1.15.0
+    image: semitechnologies/weaviate:1.15.2
     restart: on-failure:0
     ports:
-     - "8080:8080"
+      - "8080:8080"
     environment:
       CONTEXTIONARY_URL: contextionary:9999
       QUERY_DEFAULTS_LIMIT: 20