fix(ci): version lockstep with interscript-maps 2.5.0

The gemspec derives its maps dependency constraint from this version
(~> 2.5.0a now). Maps shipped 2.5.0 (the ISC corpus) on 2026-08-26 and
every CI job since has failed bundler resolution against ../maps —
main has been red since. The release of the gem itself remains an
owner decision; this only restores resolvable CI.

Author: ronaldtse

lib/interscript/version.rb

@@ -1,3 +1,3 @@
 module Interscript
-  VERSION = "2.4.5"
+  VERSION = "2.5.0"
 end