go.toolchain.rev: update to Go 1.25.3

Updates tailscale/go#140
Updates tailscale/go#142
Updates tailscale/go#138

Change-Id: Id25b6fa4e31eee243fec17667f14cdc48243c59e
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f