Update memcached

Changes:

- https://github.com/docker-library/memcached/commit/294c4e5: Merge pull request https://github.com/docker-library/memcached/pull/65 from J0WI/alpine-3.13
- https://github.com/docker-library/memcached/commit/2f06a1e: Alpine 3.13

library/memcached

@@ -11,5 +11,5 @@ Directory: debian
 
 Tags: 1.6.9-alpine, 1.6-alpine, 1-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: e67da60d356bf67cf1f822c563dd522c19d48deb
+GitCommit: 2f06a1eacb5ca1bbdcc1a1b57334897e04d7a270
 Directory: alpine