[ruby/irb] Bump version to v1.13.2

(https://github.com/ruby/irb/pull/970)

https://github.com/ruby/irb/commit/35de7dacd4

lib/irb/version.rb

@@ -5,7 +5,7 @@
 #
 
 module IRB # :nodoc:
-  VERSION = "1.13.1"
+  VERSION = "1.13.2"
   @RELEASE_VERSION = VERSION
-  @LAST_UPDATE_DATE = "2024-05-05"
+  @LAST_UPDATE_DATE = "2024-06-15"
 end