Update 3.9 to 3.9.21

Author: docker-library-bot

3.9/alpine3.19/Dockerfile

@@ -103,7 +103,7 @@
   "3.9": {
     "checksums": {
       "source": {
-        "sha256": "6b281279efd85294d2d6993e173983a57464c0133956fbbb5536ec9646beaf0c"
+        "sha256": "3126f59592c9b0d798584755f2bf7b081fa1ca35ce7a6fea980108d752a05bb1"
       }
     },
     "setuptools": {
@@ -117,6 +117,6 @@
       "alpine3.20",
       "alpine3.19"
     ],
-    "version": "3.9.20"
+    "version": "3.9.21"
   }
 }