Log Message:
textproc/hs-cmark-gfm: Update to 0.2.5

cmark-gfm 0.2.5 (27 Sep 2022)
* Add support for enabling footnotes (#26, Anton Sorokin).

cmark-gfm 0.2.4 (22 Sep 2022)
* Pull in upstream changes (includes security fix).

cmark-gfm 0.2.3 (9 Mar 2022)
* Pull in upstream changes.