Bump alpine version for 3.7.0.2 to 3.21.6

Author: tarleb

3.7.0.2/alpine/Dockerfile

@@ -1,5 +1,5 @@
 # Base ##################################################################
-ARG base_image_version=3.21.5
+ARG base_image_version=3.21.6
 FROM alpine:$base_image_version AS builder-base
 WORKDIR /app
 
@@ -402,7 +402,7 @@ RUN find dist-newstyle \
          -exec cp '{}' /usr/local/bin/ ';'
 
 # Minimal ###############################################################
-FROM alpine:3.21.5 AS minimal
+FROM alpine:3.21.6 AS minimal
 ARG pandoc_version=edge
 LABEL maintainer='Albert Krewinkel <albert+pandoc@tarleb.com>'
 LABEL org.pandoc.maintainer='Albert Krewinkel <albert+pandoc@tarleb.com>'

3.7.0.2/static/Dockerfile

@@ -1,5 +1,5 @@
 # Builder
-FROM alpine:3.21.5 AS builder-base
+FROM alpine:3.21.6 AS builder-base
 
 RUN apk --no-cache add \
         alpine-sdk \

config.yaml

@@ -80,8 +80,8 @@ release:
       - '3.7.0'
       - '3.7'
     base-image:
-      alpine: '3.21.5'
-      static: '3.21.5'
+      alpine: '3.21.6'
+      static: '3.21.6'
       ubuntu: 'noble'
     addon:
       latex: