Rename RescueNode#exception to RescueNode#reference #2600

Job	Run time
build-jruby	52s
build-debug-mode (ubuntu-latest)	32s
build-debug-mode (macos-latest)	1m 7s
build-debug-mode (windows-latest)	3m 14s
build (ubuntu-latest)	38s
build (macos-latest)	1m 9s
build (windows-latest)	2m 41s
build-without-assertions (ubuntu-20.04)	22s
build-without-assertions (ubuntu-22.04)	1m 31s
gem-package	21s
lex-discourse	1m 17s
lex-ruby	2m 20s
lex-top-100	6m 3s
memcheck	8m 14s
gem-install (3.2, ubuntu-latest)	26s
gem-install (3.2, macos-latest)	1m 5s
gem-install (3.2, windows-latest)	6m 4s
gem-install (head, ubuntu-latest)	1m 36s
gem-install (head, macos-latest)	3m 21s
gem-install (head, windows-latest)	11m 42s
	54m 35s

Provide feedback