fixed logging start page

public/app/plugins/datasource/prometheus/components/PromCheatSheet.tsx

@@ -21,7 +21,7 @@ const CHEAT_SHEET_ITEMS = [
 
 export default (props: any) => (
   <div>
-    <h1>PromQL Cheat Sheet</h1>
+    <h2>PromQL Cheat Sheet</h2>
     {CHEAT_SHEET_ITEMS.map(item => (
       <div className="cheat-sheet-item" key={item.expression}>
         <div className="cheat-sheet-item__title">{item.title}</div>

public/app/plugins/datasource/prometheus/components/PromStart.tsx

@@ -1,8 +1,11 @@
 import React, { PureComponent } from 'react';
-
 import PromCheatSheet from './PromCheatSheet';
 
-export default class PromStart extends PureComponent<any> {
+interface Props {
+  onClickExample: () => void;
+}
+
+export default class PromStart extends PureComponent<Props> {
   render() {
     return (
       <div className="grafana-info-box">