Update K8s images in base to v6.9.391

Author: DaedalusG

base/sourcegraph/redis/redis-cache.Deployment.yaml

@@ -26,7 +26,7 @@ spec:
     spec:
       containers:
         - name: redis-cache
-          image: index.docker.io/sourcegraph/redis-cache:6.2.1106@sha256:57b3318d4587f66582bf9c02756c67460e6c3d809aa0763f30cac18609cdbecc
+          image: us-docker.pkg.dev/sourcegraph-images/internal/redis-cache:6.9.391@sha256:7ddb02c3560277ccb76f1ab1f185b9a0cee300a21e74ca33f4ceecc7924ffc73
           terminationMessagePolicy: FallbackToLogsOnError
           livenessProbe:
             initialDelaySeconds: 30
@@ -70,7 +70,7 @@ spec:
             - mountPath: /redis-data
               name: redis-data
         - name: redis-exporter
-          image: index.docker.io/sourcegraph/redis_exporter:6.2.1106@sha256:5974c85aae470ecd7c565862a16592887f4d111a28ef0e3bb1e400323540a397
+          image: us-docker.pkg.dev/sourcegraph-images/internal/redis_exporter:6.9.391@sha256:3438e26b34a7070f7591a6b5f55474577e576b2d74007f77a008628b335cd31a
           terminationMessagePolicy: FallbackToLogsOnError
           ports:
             - containerPort: 9121