refactor: added the include header

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Author: anandkaranubc

lib/node_modules/@stdlib/stats/base/dists/degenerate/quantile/src/main.c

@@ -17,6 +17,7 @@
 */
 
 #include "stdlib/math/base/assert/is_nan.h"
+#include "stdlib/stats/base/dists/degenerate/quantile.h"
 
 /**
 * Evaluates the quantile function for a degenerate distribution centered at `mu`.