Specify commit hash of debug in bundled_gems

gems/bundled_gems

@@ -20,7 +20,7 @@ matrix              0.4.2   https://github.com/ruby/matrix
 prime               0.1.2   https://github.com/ruby/prime
 rbs                 3.6.1   https://github.com/ruby/rbs
 typeprof            0.21.11 https://github.com/ruby/typeprof 167263ca3a634b61df0445f1a6b3e259a5d47f94
-debug               1.9.2   https://github.com/ruby/debug
+debug               1.9.2   https://github.com/ruby/debug 9c4279598e9e0376657b3813bf76a206f1f97beb
 racc                1.8.1   https://github.com/ruby/racc
 mutex_m             0.2.0   https://github.com/ruby/mutex_m
 getoptlong          0.2.1   https://github.com/ruby/getoptlong