Bump version to 0.24.0

[digitalmoksha]

Bump version to 0.24.0 in prep for new release

[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
./bench.sh ./comrak-b9a73ad	324.3 ± 2.8	320.8	333.6	2.76 ± 0.18
./bench.sh ./comrak-main	329.1 ± 6.8	323.2	357.6	2.81 ± 0.19
./bench.sh ./pulldown-cmark	117.3 ± 7.5	112.7	145.0	1.00
./bench.sh ./cmark-gfm	124.3 ± 2.0	120.8	128.7	1.06 ± 0.07
./bench.sh ./markdown-it	495.5 ± 4.4	488.7	506.2	4.22 ± 0.27

Run on Sat May 18 14:47:03 UTC 2024