Fix smgrtruncate code comment.

From bea97f2f35e6f6fce9c4a1c29158fd1433a27680 Mon Sep 17 00:00:00 2001
From: reshke <reshke@double.cloud>
Date: Mon, 29 Jul 2024 10:44:22 +0000
Subject: [PATCH v1] Fix smgrtruncate code comment.

---
 src/backend/storage/smgr/smgr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/storage/smgr/smgr.c b/src/backend/storage/smgr/smgr.c
index a691aed1f4..e8867f860d 100644
--- a/src/backend/storage/smgr/smgr.c
+++ b/src/backend/storage/smgr/smgr.c
@@ -733,8 +733,8 @@ smgrtruncate(SMgrRelation reln, ForkNumber *forknum, int nforks, BlockNumber *nb
 		/*
 		 * We might as well update the local smgr_cached_nblocks values. The
 		 * smgr cache inval message that this function sent will cause other
-		 * backends to invalidate their copies of smgr_fsm_nblocks and
-		 * smgr_vm_nblocks, and these ones too at the next command boundary.
+		 * backends to invalidate their copies of smgr_cached_nblocks,
+		 * and these ones too at the next command boundary.
 		 * But these ensure they aren't outright wrong until then.
 		 */
 		reln->smgr_cached_nblocks[forknum[i]] = nblocks[i];
-- 
2.25.1