docs: fix C codeblocks in stats/base/dists/exponenetial/logcdf#10961

Planeshifter merged 1 commit intostdlib-js:developstdlib-js/stdlib:developfrom

Om-A-osc:docs/stats-base-dists-exponential-logcdfOm-A-osc/stdlib:docs/stats-base-dists-exponential-logcdfCopy head branch name to clipboard