Update 3.15-rc to 3.15.0b4

Author: docker-library-bot

3.15-rc/alpine3.23/Dockerfile

@@ -98,10 +98,10 @@
   "3.15-rc": {
     "checksums": {
       "source": {
-        "sha256": "6a935ae234a67e6549894373b0cfeb8361182d03b21442328ae9598ab7422127"
+        "sha256": "93efb9c88d7b6633368e7f7b8f8db6e98988f7f761c09b77849447262841ce3a"
       },
       "windows": {
-        "sha256": "8002dbdf7277964a3c50f5deef090dfcd0769647a35aec97999f63d5f2903d38"
+        "sha256": "56387cf17effe4ae5464c3af0fa2f74758cbfaddcd1d30b0dd29afdf0e5b4295"
       }
     },
     "variants": [
@@ -114,6 +114,6 @@
       "windows/windowsservercore-ltsc2025",
       "windows/windowsservercore-ltsc2022"
     ],
-    "version": "3.15.0b3"
+    "version": "3.15.0b4"
   }
 }