Capitalize Data Fetching title in docs (#18001)

Noticed that most of our mentions to Data Fetching are capitalized in both words, but the page itself wasn't. And it's not consistent with the titles in other sections

docs/api-reference/data-fetching/getInitialProps.md

@@ -8,7 +8,7 @@ description: Enable Server-Side Rendering in a page and do initial data populati
 >
 > If you're using Next.js 9.3 or newer, we recommend that you use `getStaticProps` or `getServerSideProps` instead of `getInitialProps`.
 >
-> These new data fetching methods allow you to have a granular choice between static generation and server-side rendering. Learn more on the documentation for [Pages](/docs/basic-features/pages.md) and [Data fetching](/docs/basic-features/data-fetching.md).
+> These new data fetching methods allow you to have a granular choice between static generation and server-side rendering. Learn more on the documentation for [Pages](/docs/basic-features/pages.md) and [Data Fetching](/docs/basic-features/data-fetching.md).
 
 `getInitialProps` enables [server-side rendering](/docs/basic-features/pages.md#server-side-rendering) in a page and allows you to do **initial data population**, it means sending the [page](/docs/basic-features/pages.md) with the data already populated from the server. This is especially useful for [SEO](https://en.wikipedia.org/wiki/Search_engine_optimization).
 

docs/basic-features/data-fetching.md

@@ -2,7 +2,7 @@
 description: 'Next.js has 2 pre-rendering modes: Static Generation and Server-side rendering. Learn how they work here.'
 ---
 
-# Data fetching
+# Data Fetching
 
 > This document is for Next.js versions 9.3 and up. If you’re using older versions of Next.js, refer to our [previous documentation](https://nextjs.org/docs/tag/v9.2.2/basic-features/data-fetching).
 

docs/manifest.json

@@ -14,7 +14,7 @@
               "path": "/docs/basic-features/pages.md"
             },
             {
-              "title": "Data fetching",
+              "title": "Data Fetching",
               "path": "/docs/basic-features/data-fetching.md"
             },
             {