fs/proc/base.c: fix the wrong format specifier

Use '%d' instead of '%u' for int.

Link: https://lkml.kernel.org/r/20250903083948.2536-1-zhangjiao2@cmss.chinamobile.com
Signed-off-by: zhang jiao <zhangjiao2@cmss.chinamobile.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: xu xin <xu.xin16@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: zhang jiao

fs/proc/base.c

@@ -3945,7 +3945,7 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
 		tid = task_pid_nr_ns(task, ns);
 		if (!tid)
 			continue;	/* The task has just exited. */
-		len = snprintf(name, sizeof(name), "%u", tid);
+		len = snprintf(name, sizeof(name), "%d", tid);
 		if (!proc_fill_cache(file, ctx, name, len,
 				proc_task_instantiate, task, NULL)) {
 			/* returning this tgid failed, save it as the first