docs(Search): fix wrong description for input shorthand (#3727)

* Fix wrong documentation for Search `input`.

* Update Search.d.ts

Author: ablakey

src/modules/Search/Search.d.ts

@@ -143,7 +143,7 @@ export interface StrictSearchProps {
   /** A search can have its results take up the width of its container. */
   fluid?: boolean
 
-  /** A search input can take up the width of its container. */
+  /** Shorthand for input element. */
   input?: SemanticShorthandItem<InputProps>
 
   /** A search can show a loading indicator. */

src/modules/Search/Search.js

@@ -167,7 +167,7 @@ export default class Search extends Component {
     /** A search can have its results take up the width of its container. */
     fluid: PropTypes.bool,
 
-    /** A search input can take up the width of its container. */
+    /** Shorthand for input element. */
     input: customPropTypes.itemShorthand,
 
     /** A search can show a loading indicator. */