cmd/bent: lower default go.mod version to 1.25

I didn't realize we were still running 1.25 perf tests.
Oops.

Fixes golang/go#80674
Fixes golang/go#80675

Change-Id: I0cce967ae90eda45fc17e579433bd5c272d8a5ae
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/816920
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

cmd/bent/bent.go

diff --git a/cmd/bent/bent.go b/cmd/bent/bent.go
index f186fa5..586d93c 100644
--- a/cmd/bent/bent.go
+++ b/cmd/bent/bent.go
@@ -125,7 +125,7 @@
 var shuffle = 2             // Dimensionality of (build) shuffling; 0 = none, 1 = per-benchmark, configuration ordering, 2 = bench, config pairs, 3 = across repetitions.
 var reportBuildTime = true
 var experiment = false // Don't reset go.mod, for testing purposes
-var minGoVersion = "1.26"
+var minGoVersion = "1.25"
 
 //go:embed scripts/*
 var scripts embed.FS