upgrade openssh-server package from v9.1_p1-r1 to v9.1_p1-r2 (double free patch)

https://git.alpinelinux.org/aports/commit/main/openssh?h=3.17-stable&id=dcb5c2cc1e0184bf3d57e5ca57c04fb910bd4268

Dockerfile

@@ -1,7 +1,7 @@
 FROM docker.io/alpine:3.17.1
 
 ARG BORGBACKUP_PACKAGE_VERSION=1.2.2-r1
-ARG OPENSSH_SERVER_PACKAGE_VERSION=9.1_p1-r1
+ARG OPENSSH_SERVER_PACKAGE_VERSION=9.1_p1-r2
 ARG TINI_PACKAGE_VERSION=0.19.0-r1
 ARG USER=borg
 ENV SSHD_HOST_KEYS_DIR=/etc/ssh/host_keys