Update supported go versions to 1.25+1.26

Follow the release of go 1.26.0 today, go 1.24 is no longer supported by
upstream.
diff --git a/test/go/go.mod b/test/go/go.mod
index 96e6828..43e77a5 100644
--- a/test/go/go.mod
+++ b/test/go/go.mod
@@ -1,6 +1,6 @@
 module github.com/apache/thrift/test/go
 
-go 1.24
+go 1.25
 
 require (
 	github.com/apache/thrift v0.0.0-00010101000000-000000000000