upgrade rsync packages from v3.2.4-r1 to v3.2.4-r2 (fixes CVE-2022-29154)

https://git.alpinelinux.org/aports/commit/main/rsync?h=3.16-stable&id=005c837e5e7c10bb2a985a8f610bb43efd2fa7b1

Dockerfile

@@ -1,6 +1,6 @@
 FROM docker.io/alpine:3.16.1
 
-ARG RSYNC_PACKAGE_VERSION=3.2.4-r1
+ARG RSYNC_PACKAGE_VERSION=3.2.4-r2
 ARG OPENSSH_SERVER_PACKAGE_VERSION=9.0_p1-r2
 RUN apk add --no-cache \
     openssh-server=$OPENSSH_SERVER_PACKAGE_VERSION \