Update cassandra

Changes:

- https://github.com/docker-library/cassandra/commit/8b1427f: Merge pull request https://github.com/docker-library/cassandra/pull/217 from infosiftr/focal
- https://github.com/docker-library/cassandra/commit/ac67762: Update to Ubuntu Focal
- https://github.com/docker-library/cassandra/commit/871b6f0: Fix .gitattributes specificity

library/cassandra

@@ -6,25 +6,25 @@ GitRepo: https://github.com/docker-library/cassandra.git
 
 Tags: 4.0-beta2, 4.0
 Architectures: amd64, arm32v7, arm64v8, ppc64le
-GitCommit: b6554329fe112243d16861b441067227eedcbdf9
+GitCommit: ac677624ce2dd33c995a55755a2a1dc9918b9a4e
 Directory: 4.0
 
 Tags: 3.11.8, 3.11, 3, latest
-Architectures: amd64, arm32v7, arm64v8, ppc64le
-GitCommit: 48c0cc4587c8b13dfc8d05d82cf68ee18753ca23
+Architectures: amd64, arm64v8, ppc64le
+GitCommit: ac677624ce2dd33c995a55755a2a1dc9918b9a4e
 Directory: 3.11
 
 Tags: 3.0.22, 3.0
-Architectures: amd64, arm32v7, arm64v8, ppc64le
-GitCommit: d9d67aacb2a9777be83d27b01e85771f64aab577
+Architectures: amd64, arm64v8, ppc64le
+GitCommit: ac677624ce2dd33c995a55755a2a1dc9918b9a4e
 Directory: 3.0
 
 Tags: 2.2.16, 2.2, 2
-Architectures: amd64, arm32v7, ppc64le
-GitCommit: c191e1ac6c2fe9973c7ac1f106d395d03ed05eba
+Architectures: amd64, ppc64le
+GitCommit: ac677624ce2dd33c995a55755a2a1dc9918b9a4e
 Directory: 2.2
 
 Tags: 2.1.22, 2.1
 Architectures: amd64, arm64v8, ppc64le
-GitCommit: 3c31ef99aca31c459b2cf57ee0596b4ab8024416
+GitCommit: ac677624ce2dd33c995a55755a2a1dc9918b9a4e
 Directory: 2.1