Update memcached

Changes:

- https://github.com/docker-library/memcached/commit/d2fb263: Update 1 to 1.6.33
- https://github.com/docker-library/memcached/commit/820fe71: Update README

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: 1.6.32, 1.6, 1, latest, 1.6.32-bookworm, 1.6-bookworm, 1-bookworm, bookworm
+Tags: 1.6.33, 1.6, 1, latest, 1.6.33-bookworm, 1.6-bookworm, 1-bookworm, bookworm
 Architectures: amd64, arm32v5, arm64v8, i386, mips64le, ppc64le, s390x
-GitCommit: 89c8fdb68df3a904503298751ac8862f283328e6
+GitCommit: d2fb263f47fa4043f4fe5a207c19517585867592
 Directory: 1/debian
 
-Tags: 1.6.32-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.32-alpine3.20, 1.6-alpine3.20, 1-alpine3.20, alpine3.20
+Tags: 1.6.33-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.33-alpine3.20, 1.6-alpine3.20, 1-alpine3.20, alpine3.20
 Architectures: amd64, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: 89c8fdb68df3a904503298751ac8862f283328e6
+GitCommit: d2fb263f47fa4043f4fe5a207c19517585867592
 Directory: 1/alpine