Merge pull request #542 from jnoordsij/alpine3.21

Add Alpine 3.21 variant

Author: yosifkit

1.22/alpine3.19/Dockerfile 1.22/alpine3.21/Dockerfile1.22/alpine3.19/Dockerfile renamed to 1.22/alpine3.21/Dockerfile

@@ -392,8 +392,8 @@
     "variants": [
       "bookworm",
       "bullseye",
+      "alpine3.21",
       "alpine3.20",
-      "alpine3.19",
       "windows/windowsservercore-ltsc2022",
       "windows/windowsservercore-1809",
       "windows/nanoserver-ltsc2022",
@@ -804,8 +804,8 @@
     "variants": [
       "bookworm",
       "bullseye",
+      "alpine3.21",
       "alpine3.20",
-      "alpine3.19",
       "windows/windowsservercore-ltsc2022",
       "windows/windowsservercore-1809",
       "windows/nanoserver-ltsc2022",

1.23/alpine3.19/Dockerfile 1.23/alpine3.21/Dockerfile1.23/alpine3.19/Dockerfile renamed to 1.23/alpine3.21/Dockerfile

@@ -162,8 +162,8 @@ for version in "${versions[@]}"; do
 			"bookworm",
 			"bullseye",
 			(
+				"3.21",
 				"3.20",
-				"3.19",
 				empty
 			| "alpine" + .),
 			if .arches | has("windows-amd64") and .["windows-amd64"].url then