deploy: use latest Go version for gotip bootstrap

Gotip (master) now requires go1.26.0 or later to bootstrap.
Using the previous version (go1.25.x) causes the build to fail.
Remove the -prev flag from the latestgo invocation in deploy_gotip.json
to use the latest released Go version for bootstrapping.

Change-Id: Id050e0c8a1006a6b5fc21b824c58e556cc7432f0
Reviewed-on: https://go-review.googlesource.com/c/playground/+/805081
Reviewed-by: Nicholas Husin <nsh@golang.org>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Nicholas Husin <husin@google.com>

deploy/deploy_gotip.json

diff --git a/deploy/deploy_gotip.json b/deploy/deploy_gotip.json
index 4eb8b17..1836100 100644
--- a/deploy/deploy_gotip.json
+++ b/deploy/deploy_gotip.json
@@ -5,7 +5,7 @@
       "entrypoint": "sh",
       "args": [
         "-c",
-        "go run golang.org/x/playground/cmd/latestgo -prev -toolchain > /workspace/gobootstrapversion && echo GO_BOOTSTRAP_VERSION=`cat /workspace/gobootstrapversion`"
+        "go run golang.org/x/playground/cmd/latestgo -toolchain > /workspace/gobootstrapversion && echo GO_BOOTSTRAP_VERSION=`cat /workspace/gobootstrapversion`"
       ]
     },
     {