2025-04 updates, including Leap 16.0

Updated Alpine patch releases
Updated Alma, Debian, Rocky minor releases
Updated Arch install media
Enabled LEAP 16.0

distros/alpine/3.19.0/amd64.pkrvars.hcl

@@ -1,8 +1,8 @@
 distro  = "alpine"
 version = "3.19.0"
 iso = {
-  url      = "http://dl-cdn.alpinelinux.org/alpine/v3.19/releases/x86_64/alpine-extended-3.19.4-x86_64.iso"
-  checksum = "1b7efcb485ec5ce6f662782ba318a8a75b33be07188b6da0e005e03744afe3c1"
+  url      = "https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/x86_64/alpine-extended-3.19.7-x86_64.iso"
+  checksum = "cbcb657e968ed88941fdbade9f26dcb241cb5ee3da496150dc584d7159055ac5"
 }
 boot_command = [
   "root<enter><wait1>",

distros/alpine/3.20/amd64.pkrvars.hcl

@@ -1,8 +1,8 @@
 distro  = "alpine"
 version = "3.20"
 iso = {
-  url      = "http://dl-cdn.alpinelinux.org/alpine/v3.20/releases/x86_64/alpine-standard-3.20.3-x86_64.iso"
-  checksum = "c66fc1e0470781f8ecbab8eb9cc8d906066171a5e0c6c1ab20aedc7061836d27"
+  url      = "https://dl-cdn.alpinelinux.org/alpine/v3.20/releases/x86_64/alpine-extended-3.20.6-x86_64.iso"
+  checksum = "171974b08932fa437acda9728ad5d600a04f50538156f03358ecf55efbecfff1"
 }
 boot_command = [
   "root<enter><wait1>",

distros/alpine/3.21/amd64.pkrvars.hcl

@@ -1,8 +1,8 @@
 distro  = "alpine"
 version = "3.21"
 iso = {
-  url      = "https://dl-cdn.alpinelinux.org/alpine/v3.21/releases/x86_64/alpine-standard-3.21.2-x86_64.iso"
-  checksum = "706e9521cd21188786cb983131040ee68399e504924ea3318d600d1e04a93878"
+  url      = "https://dl-cdn.alpinelinux.org/alpine/v3.21/releases/x86_64/alpine-extended-3.21.3-x86_64.iso"
+  checksum = "3e0ab3b6b4409bd0012be59970f08522e7fb049b6634242875e30add290f5444"
 }
 boot_command = [
   "root<enter><wait1>",