NEWS: add entries for fixed bugs

Add NEWS entries to the list of bugs that were fixed after glibc 2.32
release: 24973, 25399, 26383, 26690, 26798, 26831, 26926, 26988, 27024,
27068, 27256, 27398, 27462, 27471, 27476, 27511, 27609, 27655, 27896,
28011, 28033, 28064, 28213, 29304, and 29611.