jemalloc: Note update in UPDATING and RELNOTES

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RELNOTES

@@ -10,6 +10,10 @@ newline.  Entries should be separated by a newline.
 
 Changes to this file should not be MFCed.
 
+c43cad871720:
+	jemalloc 5.3.0 has landed. See contrib/jemalloc/ChangeLog
+	for the long list of changes.
+
 cce64f2e6851:
 	Add support for the NFSv4.2 Clone operation, which uses
 	block cloning to "copy on write" files on an NFS server.

UPDATING

@@ -27,6 +27,9 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250815:
+	jemalloc 5.3.0 has been committed to the tree.
+
 20250815:
 	The removal of Secure RPC DES authentication notced in 20250810
 	has been reverted.  (However, it is still non-functional.)