Update memcached

[tianon]

Changes:

• docker-library/memcached@70a1ff5: Merge pull request Remove Alpine arm32 builds memcached#105 from infosiftr/no-alpine-arm32
• docker-library/memcached@21a5d87: Remove Alpine arm32 builds

[github-actions]

Diff for 50e4671:

diff --git a/_bashbrew-arches b/_bashbrew-arches
index 3616e93..648a9e8 100644
--- a/_bashbrew-arches
+++ b/_bashbrew-arches
@@ -1,6 +1,5 @@
 amd64
 arm32v5
-arm32v6
 arm32v7
 arm64v8
 i386
diff --git a/_bashbrew-cat b/_bashbrew-cat
index 83eccea..010447d 100644
--- a/_bashbrew-cat
+++ b/_bashbrew-cat
@@ -7,6 +7,6 @@ GitCommit: f8aa037f70e96f77b3797a2ead8fa0e5dcdec2c1
 Directory: 1/debian
 
 Tags: 1.6.38-alpine, 1.6-alpine, 1-alpine, alpine, 1.6.38-alpine3.22, 1.6-alpine3.22, 1-alpine3.22, alpine3.22
-Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
+Architectures: amd64, arm64v8, i386, ppc64le, riscv64, s390x
 GitCommit: 9d786e2bceabc841c7858127de29ad969454d9ac
 Directory: 1/alpine

Relevant Maintainers:

• memcached: @tianon @yosifkit