docs: fix return annotation

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Author: kgryte

lib/node_modules/@stdlib/constants/float32/glaisher-kinkelin/examples/index.js

@@ -20,5 +20,5 @@
 
 var FLOAT32_GLAISHER = require( './../lib' );
 
-console.log( 'Glaisher\'s constant: %f', FLOAT32_GLAISHER );
-// => 1.2824270725250244
+console.log( 'Glaisher\'s constant: %d', FLOAT32_GLAISHER );
+// => 'Glaisher\'s constant: 1.2824270725250244'