dl: add go1.25rc1

Change-Id: I2ee33b959d140883c08ff09c483207a4387bbf0a
Reviewed-on: https://go-review.googlesource.com/c/dl/+/681055
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>

go1.25rc1/main.go

diff --git a/go1.25rc1/main.go b/go1.25rc1/main.go
new file mode 100644
index 0000000..36230dd
--- /dev/null
+++ b/go1.25rc1/main.go
@@ -0,0 +1,24 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.25rc1 command runs the go command from Go 1.25rc1.
+//
+// To install, run:
+//
+//	$ go install golang.org/dl/go1.25rc1@latest
+//	$ go1.25rc1 download
+//
+// And then use the go1.25rc1 command as if it were your normal go
+// command.
+//
+// See the release notes at https://tip.golang.org/doc/go1.25.
+//
+// File bugs at https://go.dev/issue/new.
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.25rc1")
+}