Update prefetching explanation to correctly reflect data prefetching

[timneutkens]

Fixes #13072

[ijjk]

Stats from current PR

Default Server Mode (Increase detected ⚠️)

General

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
buildDuration	11.3s	11.3s	⚠️ +10ms
nodeModulesSize	61.8 MB	61.8 MB	✓

Page Load Tests Overall increase ✓

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
/ failed reqs	0	0	✓
/ total time (seconds)	1.919	1.848	-0.07
/ avg req/sec	1302.49	1352.92	⚠️ +50.43
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.1	1.095	-0.01
/error-in-render avg req/sec	2273.54	2283.92	⚠️ +10.38

Client Bundles (main, webpack, commons)

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
main-HASH.js gzip	6.65 kB	6.65 kB	✓
webpack-HASH.js gzip	746 B	746 B	✓
de003c3a9d30..b058.js gzip	10.5 kB	10.5 kB	✓
framework.HASH.js gzip	39.1 kB	39.1 kB	✓
Overall change	57 kB	57 kB	✓

Client Bundles (main, webpack, commons) Modern

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
main-HASH.module.js gzip	5.69 kB	5.69 kB	✓
webpack-HASH..dule.js gzip	746 B	746 B	✓
de003c3a9d30..dule.js gzip	6.92 kB	6.92 kB	✓
framework.HA..dule.js gzip	39.1 kB	39.1 kB	✓
Overall change	52.5 kB	52.5 kB	✓

Legacy Client Bundles (polyfills)

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
polyfills-HASH.js gzip	26.3 kB	26.3 kB	✓
Overall change	26.3 kB	26.3 kB	✓

Client Pages

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_app.js gzip	1.26 kB	1.26 kB	✓
_error.js gzip	3.25 kB	3.25 kB	✓
hooks.js gzip	881 B	881 B	✓
index.js gzip	222 B	222 B	✓
link.js gzip	2.06 kB	2.06 kB	✓
routerDirect.js gzip	279 B	279 B	✓
withRouter.js gzip	278 B	278 B	✓
Overall change	8.22 kB	8.22 kB	✓

Client Pages Modern

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_app.module.js gzip	604 B	604 B	✓
_error.module.js gzip	2.04 kB	2.04 kB	✓
hooks.module.js gzip	383 B	383 B	✓
index.module.js gzip	223 B	223 B	✓
link.module.js gzip	1.52 kB	1.52 kB	✓
routerDirect..dule.js gzip	281 B	281 B	✓
withRouter.m..dule.js gzip	278 B	278 B	✓
Overall change	5.33 kB	5.33 kB	✓

Client Build Manifests

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_buildManifest.js gzip	61 B	61 B	✓
_buildManife..dule.js gzip	61 B	61 B	✓
Overall change	122 B	122 B	✓

Rendered Page Sizes

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
index.html gzip	928 B	928 B	✓
link.html gzip	938 B	938 B	✓
withRouter.html gzip	925 B	925 B	✓
Overall change	2.79 kB	2.79 kB	✓

---

Serverless Mode

General

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
buildDuration	11.8s	11.9s	⚠️ +62ms
nodeModulesSize	61.8 MB	61.8 MB	✓

Client Bundles (main, webpack, commons)

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
main-HASH.js gzip	6.65 kB	6.65 kB	✓
webpack-HASH.js gzip	746 B	746 B	✓
de003c3a9d30..b058.js gzip	10.5 kB	10.5 kB	✓
framework.HASH.js gzip	39.1 kB	39.1 kB	✓
Overall change	57 kB	57 kB	✓

Client Bundles (main, webpack, commons) Modern

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
main-HASH.module.js gzip	5.69 kB	5.69 kB	✓
webpack-HASH..dule.js gzip	746 B	746 B	✓
de003c3a9d30..dule.js gzip	6.92 kB	6.92 kB	✓
framework.HA..dule.js gzip	39.1 kB	39.1 kB	✓
Overall change	52.5 kB	52.5 kB	✓

Legacy Client Bundles (polyfills)

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
polyfills-HASH.js gzip	26.3 kB	26.3 kB	✓
Overall change	26.3 kB	26.3 kB	✓

Client Pages

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_app.js gzip	1.26 kB	1.26 kB	✓
_error.js gzip	3.25 kB	3.25 kB	✓
hooks.js gzip	881 B	881 B	✓
index.js gzip	222 B	222 B	✓
link.js gzip	2.06 kB	2.06 kB	✓
routerDirect.js gzip	279 B	279 B	✓
withRouter.js gzip	278 B	278 B	✓
Overall change	8.22 kB	8.22 kB	✓

Client Pages Modern

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_app.module.js gzip	604 B	604 B	✓
_error.module.js gzip	2.04 kB	2.04 kB	✓
hooks.module.js gzip	383 B	383 B	✓
index.module.js gzip	223 B	223 B	✓
link.module.js gzip	1.52 kB	1.52 kB	✓
routerDirect..dule.js gzip	281 B	281 B	✓
withRouter.m..dule.js gzip	278 B	278 B	✓
Overall change	5.33 kB	5.33 kB	✓

Client Build Manifests

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_buildManifest.js gzip	61 B	61 B	✓
_buildManife..dule.js gzip	61 B	61 B	✓
Overall change	122 B	122 B	✓

Serverless bundles

	zeit/next.js canary	timneutkens/next.js fix/improve-prefetching-docs	Change
_error.js	843 kB	843 kB	✓
404.html	4.18 kB	4.18 kB	✓
hooks.html	3.81 kB	3.81 kB	✓
index.js	843 kB	843 kB	✓
link.js	881 kB	881 kB	✓
routerDirect.js	873 kB	873 kB	✓
withRouter.js	873 kB	873 kB	✓
Overall change	4.32 MB	4.32 MB	✓