Fix LFS range size header response (#35277)

Fix #35276

Signed-off-by: LePau <101608950+LePau@users.noreply.github.com>

services/lfs/server.go

@@ -114,7 +114,7 @@ func DownloadHandler(ctx *context.Context) {
 				}
 			}
 
-			ctx.Resp.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", fromByte, toByte, meta.Size-fromByte))
+			ctx.Resp.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", fromByte, toByte, meta.Size))
 			ctx.Resp.Header().Set("Access-Control-Expose-Headers", "Content-Range")
 		}
 	}