docs: tweak feature-flags docs

docs/reference/createPlugin-feature-flags.md

@@ -24,14 +24,14 @@ export default createPlugin({
 ## Using with useApi
 
 To inspect the state of a feature flag inside your plugin, you can use the
-`FeatureFlagsApi`, accessed via the `FeatureFlagsApiRef`. For example:
+`FeatureFlagsApi`, accessed via the `featureFlagsApiRef`. For example:
 
 ```tsx
 import React, { FC } from 'react';
 import { Button } from '@material-ui/core';
 import { featureFlagsApiRef, useApi } from '@backstage/core';
 
-const ExamplePage: FC<{}> = () => {
+const ExamplePage = () => {
   const featureFlags = useApi(featureFlagsApiRef);
 
   return (