corrected @id to @ref in numerics.md #5776

Job	Run time
release (ubuntu-latest)	4m 2s
release_all_tests (ubuntu-latest)	3m 50s
Release64 (ubuntu-latest)	3m 56s
debug64 (ubuntu-latest)	4m 21s
debug_all_tests (ubuntu-latest)	5m 4s
debug (ubuntu-latest)	5m 2s
Release64_all_tests (ubuntu-latest)	3m 15s
debug64_all_tests (ubuntu-latest)	5m 10s
	34m 40s

Provide feedback