chore(deps): update valkey/valkey docker tag from 7.2.11 to v9 (docker-compose.yml)

Author: renovate[bot]

docker-compose.yml

@@ -128,7 +128,7 @@ services:
     volumes:
       - defectdojo_postgres:/var/lib/postgresql/data
   valkey:
-    image: valkey/valkey:7.2.11-alpine@sha256:36745d7c91d75dde02fa239ebe333fa1c7637249ed76f7da1c5ea838375974ff
+    image: valkey/valkey:9.0.0-alpine@sha256:bef37d06d4856710973ee31dd1eac1482e4c8e6e7b847f999ad25433e646587b
     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