chore: remove space

Author: Neerajpathak07

lib/node_modules/@stdlib/stats/base/dists/beta/kurtosis/README.md

@@ -182,7 +182,7 @@ double y = stdlib_base_dists_beta_kurtosis( 1.0, 1.0 );
 The function accepts the following arguments:
 
 -   **alpha**: `[in] double` first shape parameter.
--   **beta**:  `[in] double` second shape parameter.
+-   **beta**: `[in] double` second shape parameter.
 
 ```c
 double stdlib_base_dists_beta_kurtosis( const double alpha, const double beta );