fix: add link for historyApiFallback options (#3390)

Author: snitin315

lib/options.json

@@ -394,7 +394,8 @@
           "type": "boolean"
         },
         {
-          "type": "object"
+          "type": "object",
+          "description": "Options for `historyApiFallback`, description available at https://github.com/bripkens/connect-history-api-fallback#options"
         }
       ],
       "description": "When using the HTML5 History API, the index.html page will likely have to be served in place of any 404 responses. https://webpack.js.org/configuration/dev-server/#devserverhistoryapifallback"

test/__snapshots__/validate-options.test.js.snap.webpack4

@@ -217,7 +217,8 @@ exports[`options validate should throw an error on the "historyApiFallback" opti
    Details:
     * configuration.historyApiFallback should be a boolean.
     * configuration.historyApiFallback should be an object:
-      object { … }"
+      object { … }
+      -> Options for \`historyApiFallback\`, description available at https://github.com/bripkens/connect-history-api-fallback#options"
 `;
 
 exports[`options validate should throw an error on the "host" option with '' value 1`] = `

test/__snapshots__/validate-options.test.js.snap.webpack5

@@ -217,7 +217,8 @@ exports[`options validate should throw an error on the "historyApiFallback" opti
    Details:
     * configuration.historyApiFallback should be a boolean.
     * configuration.historyApiFallback should be an object:
-      object { … }"
+      object { … }
+      -> Options for \`historyApiFallback\`, description available at https://github.com/bripkens/connect-history-api-fallback#options"
 `;
 
 exports[`options validate should throw an error on the "host" option with '' value 1`] = `