Update memcached

Changes:

- https://github.com/docker-library/memcached/commit/4569a8a: Update 1 to debian trixie
- https://github.com/docker-library/memcached/commit/801d650: Remove now-dead code

library/memcached

@@ -4,9 +4,9 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/memcached.git
 
-Tags: 1.6.39, 1.6, 1, latest, 1.6.39-bookworm, 1.6-bookworm, 1-bookworm, bookworm
-Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 82dce5b661528c56980b7166b1065c149fab783e
+Tags: 1.6.39, 1.6, 1, latest, 1.6.39-trixie, 1.6-trixie, 1-trixie, trixie
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+GitCommit: 4569a8aaadebe2cfc4c1b5b052eb0764519db470
 Directory: 1/debian
 
 Tags: 1.6.39-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.39-alpine3.22, 1.6-alpine3.22, 1-alpine3.22, alpine3.22