bcachefs: spelling fix

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/io_write.c

@@ -1080,7 +1080,7 @@ static int bch2_write_extent(struct bch_write_op *op, struct write_point *wp,
 	*_dst = dst;
 	return more;
 csum_err:
-	bch_err(c, "%s writ error: error verifying existing checksum while rewriting existing data (memory corruption?)",
+	bch_err(c, "%s write error: error verifying existing checksum while rewriting existing data (memory corruption?)",
 		op->flags & BCH_WRITE_MOVE ? "move" : "user");
 	ret = -EIO;
 err: