Update 5.3-rc to 5.3-beta

Author: docker-library-bot

5.3-rc/Dockerfile

@@ -138,7 +138,7 @@
     "alpine": {
       "version": "3.21"
     },
-    "version": "5.3-alpha"
+    "version": "5.3-beta"
   },
   "devel": {
     "alpine": {