Update 7.2 to alpine 3.20

Author: docker-library-bot

7.2/alpine/Dockerfile

@@ -119,7 +119,7 @@
       "version": "bookworm"
     },
     "alpine": {
-      "version": "3.19"
+      "version": "3.20"
     },
     "gosu": {
       "version": "1.17",