chore(deps): update docker.io/grafana/loki docker tag to v3.5.8

library/compose/loki/compose.yaml.j2

@@ -1,7 +1,7 @@
 services:
   loki:
     container_name: loki
-    image: docker.io/grafana/loki:3.5.7
+    image: docker.io/grafana/loki:3.5.8
     command: "-config.file=/etc/loki/config.yaml"
     ports:
       # --> (Optional) Remove when using traefik...