build(deps): bump grafana/loki from 2.9.4 to 2.9.7

Bumps grafana/loki from 2.9.4 to 2.9.7.

---
updated-dependencies:
- dependency-name: grafana/loki
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -2,7 +2,7 @@ ARG	GRAFANA_ENV
 
 FROM	prom/prometheus:v2.49.1	AS	prometheus
 
-FROM	grafana/loki:2.9.4	AS	loki
+FROM	grafana/loki:2.9.7	AS	loki
 
 FROM	prom/alertmanager:v0.26.0	AS	alertmanager