chore: add decimals

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---

Author: kgryte

lib/node_modules/@stdlib/stats/base/dists/planck/quantile/README.md

@@ -54,13 +54,13 @@ Evaluates the [quantile function][quantile-function] for a Planck distribution w
 
 ```javascript
 var y = quantile( 0.8, 0.4 );
-// returns 4
+// returns 4.0
 
 y = quantile( 0.5, 1.4 );
-// returns 0
+// returns 0.0
 
 y = quantile( 0.9, 2.1 );
-// returns 1
+// returns 1.0
 ```
 
 If provided an input probability `p` outside the interval `[0,1]`, the function returns `NaN`.
@@ -97,10 +97,10 @@ Returns a function for evaluating the [quantile function][quantile-function] for
 ```javascript
 var myquantile = quantile.factory( 0.4 );
 var y = myquantile( 0.4 );
-// returns 1
+// returns 1.0
 
 y = myquantile( 0.8 );
-// returns 4
+// returns 4.0
 
 y = myquantile( 1.0 );
 // returns Infinity