Ruby

Bump ruby-lsp from 0.23.21 to 0.23.23 in /steep #6900

Job	Run time
C99_compile (3.4)	47s
C99_compile (head)	1m 9s
test (3.1, test)	2m 44s
valgrind	52m 9s
test (3.2, test)	2m 59s
test (3.3, test)	3m 23s
test (3.4, test)	2m 55s
test (head, test)	3m 33s
test (head, stdlib_test rubocop)	2m 58s
test (3.4, stdlib_test)	2m 11s
test (3.4, test, --enable-frozen-string-literal)	3m 6s
test (3.4, stdlib_test, --enable-frozen-string-literal)	2m 48s
test (3.4, rubocop validate test_doc build test_generate_stdlib raap)	2m 39s
test (3.4, typecheck_test)	1m 15s
	1h 24m 36s

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