chore(deps): pin grafana/grafana docker tag to 62d2b9d (jaegertracing#8219)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grafana/grafana](https://redirect.github.com/grafana/grafana) |
pinDigest | → `62d2b9d` |

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docker-compose/monitor/docker-compose.yml

@@ -41,7 +41,7 @@ services:
   grafana:
     networks:
       - backend
-    image: grafana/grafana:11.6.0
+    image: grafana/grafana:11.6.0@sha256:62d2b9d20a19714ebfe48d1bb405086081bc602aa053e28cf6d73c7537640dfb
     volumes:
       - "./grafana/provisioning:/etc/grafana/provisioning"
       - "../../monitoring/jaeger-mixin/dashboard-for-grafana.json:/etc/grafana/provisioning/dashboards/jaeger.json:ro"