Update cassandra

Changes:

- https://github.com/docker-library/cassandra/commit/b5915c6: Update 4.0 to 4.0.9

library/cassandra

@@ -9,9 +9,9 @@ Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
 GitCommit: 8ae7e0d435107e968e9609567ef772876ea7d512
 Directory: 4.1
 
-Tags: 4.0.8, 4.0
+Tags: 4.0.9, 4.0
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: 1737da9eb0a7ba2e691778355730816f9fa7bad9
+GitCommit: b5915c67f0cd255700a71a24f3b314a0280f81c6
 Directory: 4.0
 
 Tags: 3.11.14, 3.11, 3