chore: add empty lines in README.md sections

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/bernoulli/stdev/README.md

@@ -208,13 +208,15 @@ int main( void ) {
 </section>
 
 <!-- /.c -->
+
 <!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
 
 <section class="references">
 
 </section>
 
 <!-- /.references -->
+
 <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
 
 <section class="related">