Bumps alpine from 3.13.4 to 3.13.5. Signed-off-by: dependabot[bot] <support@github.com>
@@ -1,4 +1,4 @@
-FROM docker.io/alpine:3.13.4
+FROM docker.io/alpine:3.13.5
ARG BORGBACKUP_PACKAGE_VERSION=1.1.15-r0
ARG OPENSSH_SERVER_PACKAGE_VERSION=8.4_p1-r3