docs: fix return annotation values

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---

Author: Planeshifter

lib/node_modules/@stdlib/math/base/special/gamma-lanczos-sum-expg-scaledf/README.md

@@ -145,10 +145,10 @@ Calculates the Lanczos sum for the approximation of the [gamma function][gamma-f
 
 ```c
 float out = stdlib_base_gamma_lanczos_sum_expg_scaledf( 4.0f );
-// returns ~0.018f
+// returns ~0.748f
 
 out = stdlib_base_gamma_lanczos_sum_expg_scaledf( -1.5f );
-// returns ~25.337f
+// returns ~0.193f
 ```
 
 The function accepts the following arguments: