docs: fix incorrect return value in stats/base/dists/exponenetial/logpdf/README.md#10963

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

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