use go 1.26 (#128)

* use go 1.26

1.24 is out of support

Author: moleske

go.mod

@@ -1,8 +1,6 @@
 module github.com/cloudfoundry/stack-auditor
 
-go 1.24.0
-
-toolchain go1.24.2
+go 1.26
 
 require (
 	code.cloudfoundry.org/cli v7.1.0+incompatible