chore(deps): update valkey/valkey:9.1.0-alpine docker digest from 9.1.0 to 9.1.0-alpine (docker-compose.yml)

Author: renovate[bot]

docker-compose.yml

@@ -132,7 +132,7 @@ services:
     volumes:
       - defectdojo_postgres:/var/lib/postgresql/data
   valkey:
-    image: valkey/valkey:9.1.0-alpine@sha256:a35428eba9043cc0b79dbe54100f0c92784f2de00ad09b01182bfb1c5c83d1bd
+    image: valkey/valkey:9.1.0-alpine@sha256:c9b77919daeba2c02ad954d0c844cc4e7142069d177b89c5fd771f405daf9e02
     volumes:
       # we keep using the redis volume as renaming is not possible and copying data over
       # would require steps during downtime or complex commands in the intializer