Update to Alpine 3.23

Drop Alpine 3.21 accordingly

Author: tianon

1.10/alpine3.21/Dockerfile 1.10/alpine3.23/Dockerfile1.10/alpine3.21/Dockerfile renamed to 1.10/alpine3.23/Dockerfile

@@ -89,8 +89,8 @@
     "variants": [
       "trixie",
       "bookworm",
+      "alpine3.23",
       "alpine3.22",
-      "alpine3.21",
       "windows/servercore-ltsc2025",
       "windows/servercore-ltsc2022"
     ]

1.10/alpine3.21/docker-entrypoint.sh 1.10/alpine3.23/docker-entrypoint.sh1.10/alpine3.21/docker-entrypoint.sh renamed to 1.10/alpine3.23/docker-entrypoint.sh

@@ -119,8 +119,8 @@ for version in "${versions[@]}"; do
 			"trixie",
 			"bookworm",
 			if .arches | keys | any(startswith("alpine-")) then
+				"3.23",
 				"3.22",
-				"3.21",
 				empty
 				| "alpine" + .
 			else empty end,