ICU-22724 Update urename.h for ICU 76.1 final. #3015

Job	Run time
clang-valgrind-test	10m 10s
clang-valgrind-intltest (utility)	6m 34s
clang-valgrind-intltest (normalize)	6m 7s
clang-valgrind-intltest (collator)	5m 9s
clang-valgrind-intltest (regex)	5m 26s
clang-valgrind-intltest (format)	16m 12s
clang-valgrind-intltest (translit)	5m 50s
clang-valgrind-intltest (rbbi)	7m 46s
clang-valgrind-intltest (rbnf)	6m 28s
clang-valgrind-intltest (rbnfrt)	6m 15s
clang-valgrind-intltest (icuserv)	5m 20s
clang-valgrind-intltest (idna)	5m 11s
clang-valgrind-intltest (convert)	6m 53s
clang-valgrind-intltest (rbnfp)	5m 6s
clang-valgrind-intltest (csdet)	5m 27s
clang-valgrind-intltest (spoof)	5m 19s
clang-valgrind-intltest (bidi)	5m 36s
	1h 54m 49s

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