Fix invalid format string in HASH_DEBUG code

This seems to have been broken back in be0a66666.

Reported-by: Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>
Author: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/OSCPR01MB14966E11EEFB37D7857FCEDB7F535A@OSCPR01MB14966.jpnprd01.prod.outlook.com
Backpatch-through: 14

src/backend/utils/hash/dynahash.c

@@ -756,7 +756,7 @@ init_htab(HTAB *hashp, long nelem)
 	hctl->nelem_alloc = choose_nelem_alloc(hctl->entrysize);
 
 #ifdef HASH_DEBUG
-	fprintf(stderr, "init_htab:\n%s%p\n%s%ld\n%s%ld\n%s%d\n%s%ld\n%s%u\n%s%x\n%s%x\n%s%ld\n",
+	fprintf(stderr, "init_htab:\n%s%p\n%s%ld\n%s%ld\n%s%d\n%s%u\n%s%x\n%s%x\n%s%ld\n",
 			"TABLE POINTER   ", hashp,
 			"DIRECTORY SIZE  ", hctl->dsize,
 			"SEGMENT SIZE    ", hctl->ssize,