chore(deps): update alpine docker tag to v3.22.0

Author: renovate[bot]

build-images.sh

@@ -55,7 +55,7 @@ images+=("${repobase}/${reponame}")
 # davidep: avoid dovecot 2.3.19-r2 - userdb lookup crashes
 #
 reponame="mail-dovecot"
-container=$(buildah from docker.io/library/alpine:3.21.3)
+container=$(buildah from docker.io/library/alpine:3.22.0)
 buildah run "${container}" /bin/sh <<'EOF'
 set -e
 addgroup -g 101 -S vmail
@@ -125,7 +125,7 @@ images+=("${repobase}/${reponame}")
 # Postfix additional image
 #
 reponame="mail-postfix"
-container=$(buildah from docker.io/library/alpine:3.21.3)
+container=$(buildah from docker.io/library/alpine:3.22.0)
 buildah run "${container}" /bin/sh <<EOF
 set -e
 apk add --no-cache postfix gettext sqlite postfix-sqlite postfix-ldap openssl cyrus-sasl-login
@@ -149,7 +149,7 @@ images+=("${repobase}/${reponame}")
 # Rspamd additional image
 #
 reponame="mail-rspamd"
-container=$(buildah from docker.io/library/alpine:3.21.3)
+container=$(buildah from docker.io/library/alpine:3.22.0)
 buildah run "${container}" /bin/sh <<EOF
 set -e
 # Software installation order is important to preserve uid and gid allocation:
@@ -177,7 +177,7 @@ images+=("${repobase}/${reponame}")
 # ClamAV additional image
 #
 reponame="mail-clamav"
-container=$(buildah from docker.io/library/alpine:3.21.3)
+container=$(buildah from docker.io/library/alpine:3.22.0)
 buildah run "${container}" /bin/sh <<'EOF'
 set -e
 apk add --no-cache ncurses bash curl wget rsync bind-tools socat gpg gpg-agent