Update memcached

Changes:

- https://github.com/docker-library/memcached/commit/3598423: Update 1 to 1.6.31

library/memcached

@@ -4,12 +4,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/memcached.git
 
-Tags: 1.6.30, 1.6, 1, latest, 1.6.30-bookworm, 1.6-bookworm, 1-bookworm, bookworm
+Tags: 1.6.31, 1.6, 1, latest, 1.6.31-bookworm, 1.6-bookworm, 1-bookworm, bookworm
 Architectures: amd64, arm32v5, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: fe1178984dc98b5515f3adda0655fdba9cd30bbf
+GitCommit: 3598423e1058ace87504520c43095bf87438deaf
 Directory: 1/debian
 
-Tags: 1.6.30-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.30-alpine3.20, 1.6-alpine3.20, 1-alpine3.20, alpine3.20
+Tags: 1.6.31-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.31-alpine3.20, 1.6-alpine3.20, 1-alpine3.20, alpine3.20
 Architectures: amd64, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: fe1178984dc98b5515f3adda0655fdba9cd30bbf
+GitCommit: 3598423e1058ace87504520c43095bf87438deaf
 Directory: 1/alpine