Update grafana/loki Docker tag to v3.6.3

Author: renovate[bot]

build/loki/docker-compose.yml

@@ -3,7 +3,7 @@ networks:
 
 services:
   loki:
-    image: grafana/loki:3.5.1@sha256:a74594532eec4cc313401beedc4dd2708c43674c032084b1aeb87c14a5be1745
+    image: grafana/loki:3.6.3@sha256:cd6e176883a90c21755f0315688668991634143423f75bdedfef41441b0fdc3c
     ports:
       - "3100:3100"
     command: -config.file=/etc/loki/local-config.yaml —log.level= debug