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/go.mod b/go.mod
index 8d1f852..3d1ea89 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/apache/thrift
 
-go 1.24
+go 1.25