docs: clean-up TSDoc example code

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---

Author: Planeshifter

lib/node_modules/@stdlib/constants/float16/docs/types/index.d.ts

@@ -115,7 +115,7 @@ interface Namespace {
 	*
 	* @example
 	* var pinf = ns.PINF;
-	* // returns Infinity
+	* // returns +infinity
 	*/
 	PINF: typeof PINF;
 

lib/node_modules/@stdlib/constants/float16/eps/docs/types/index.d.ts

@@ -22,7 +22,7 @@
 * Difference between one and the smallest value greater than one that can be represented as a half-precision floating-point number.
 *
 * @example
-* var eps = FLOAT16_EPSILON;
+* var eps = FLOAT16_EPS;
 * // returns 0.0009765625
 */
 declare const FLOAT16_EPS: number;