cmd/go: fix sumdb test failure

Fixes #31779

Change-Id: Iae80d9adcb39d12c36c525fc2738625cadcc8e41
Reviewed-on: https://go-review.googlesource.com/c/go/+/174838
Run-TryBot: Baokun Lee <nototon@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

src/cmd/go/testdata/script/mod_sumdb_proxy.txt

@@ -21,7 +21,7 @@ cp go.mod.orig go.mod
 env GOSUMDB=$sumdb
 env GOPROXY=direct
 ! go get -m rsc.io/fortune@v1.0.0
-stderr 'verifying.*localhost.localdev.*no such host'
+stderr 'verifying.*lookup.*localhost.localdev'
 rm $GOPATH/pkg/mod/download/cache/sumdb
 rm go.sum
 
@@ -30,7 +30,7 @@ cp go.mod.orig go.mod
 env GOSUMDB=$sumdb
 env GOPROXY=$proxy/sumdb-404
 ! go get -m rsc.io/fortune@v1.0.0
-stderr 'verifying.*localhost.localdev.*no such host'
+stderr 'verifying.*lookup.*localhost.localdev'
 rm $GOPATH/pkg/mod/download/cache/sumdb
 rm go.sum