chore: close references section in README

Author: Prasad-JB

lib/node_modules/@stdlib/stats/base/dists/geometric/logpmf/README.md

@@ -235,6 +235,8 @@ int main( void ) {
 
 </section>
 
+
+</section>
 <!-- /.references -->
 
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->