Bump to GNU Autoconf v2.72 (#37)

Author: erlend-aasland

autoconf/Dockerfile

@@ -1,6 +1,6 @@
 FROM docker.io/library/ubuntu:24.04
 
-ARG AUTOCONF_VERSION="2.71"
+ARG AUTOCONF_VERSION="2.72"
 ARG AUTOCONF_ARCHIVE_VERSION="2023.02.20"
 ARG AUTOMAKE_VERSION="1.16.5"