Use master commit of irb

This version of IRB has higher test timeout on CI, which is needed
for ZJIT to pass IRB integration tests.

Author: st0012

gems/bundled_gems

@@ -41,7 +41,7 @@ benchmark           0.4.1   https://github.com/ruby/benchmark
 logger              1.7.0   https://github.com/ruby/logger
 rdoc                6.14.2  https://github.com/ruby/rdoc
 win32ole            1.9.2   https://github.com/ruby/win32ole
-irb                 1.15.2  https://github.com/ruby/irb 331c4e851296b115db766c291e8cf54a2492fb36
+irb                 1.15.2  https://github.com/ruby/irb d43c3d764ae439706aa1b26a3ec299cc45eaed5b
 reline              0.6.2   https://github.com/ruby/reline
 readline            0.0.4   https://github.com/ruby/readline
 fiddle              1.1.8   https://github.com/ruby/fiddle