Fix extension name for example app (#16906)

[piotrzarycki]

Fixes: #16906

[lfades]

Thank you!

[ijjk]

Stats from current PR

Default Server Mode (Decrease detected ✓)

General

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
buildDuration	12.7s	13.4s	⚠️ +681ms
nodeModulesSize	56.7 MB	56.7 MB	✓

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.348	2.397	⚠️ +0.05
/ avg req/sec	1064.79	1043.16	⚠️ -21.63
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.417	1.577	⚠️ +0.16
/error-in-render avg req/sec	1764.7	1585.49	⚠️ -179.21

Client Bundles (main, webpack, commons)

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
677f882d2ed8..7362.js gzip	10.6 kB	10.6 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-979126c..02f7.js gzip	7.08 kB	7.08 kB	✓
webpack-e067..f178.js gzip	751 B	751 B	✓
Overall change	57.4 kB	57.4 kB	✓

Client Bundles (main, webpack, commons) Modern

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
677f882d2ed8..dule.js gzip	6.51 kB	6.51 kB	✓
framework.HA..dule.js gzip	39 kB	39 kB	✓
main-e37c8f7..dule.js gzip	6.14 kB	6.14 kB	✓
webpack-07c5..dule.js gzip	751 B	751 B	✓
Overall change	52.4 kB	52.4 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
polyfills-4b..e242.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_app-9a0b9e1..b37e.js gzip	1.28 kB	1.28 kB	✓
_error-ed1b0..8fbd.js gzip	3.44 kB	3.44 kB	✓
hooks-89731c..c609.js gzip	887 B	887 B	✓
index-17468f..5d83.js gzip	227 B	227 B	✓
link-d2344ce..8b36.js gzip	1.3 kB	1.3 kB	✓
routerDirect..924c.js gzip	284 B	284 B	✓
withRouter-7..c13d.js gzip	284 B	284 B	✓
Overall change	7.71 kB	7.71 kB	✓

Client Pages Modern

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_app-75d3a82..dule.js gzip	625 B	625 B	✓
_error-4469a..dule.js gzip	2.29 kB	2.29 kB	✓
hooks-cbf13f..dule.js gzip	387 B	387 B	✓
index-b9a643..dule.js gzip	226 B	226 B	✓
link-f8c0daf..dule.js gzip	1.26 kB	1.26 kB	✓
routerDirect..dule.js gzip	284 B	284 B	✓
withRouter-f..dule.js gzip	282 B	282 B	✓
Overall change	5.36 kB	5.36 kB	✓

Client Build Manifests

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_buildManifest.js gzip	322 B	322 B	✓
_buildManife..dule.js gzip	329 B	329 B	✓
Overall change	651 B	651 B	✓

Rendered Page Sizes

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
index.html gzip	973 B	973 B	✓
link.html gzip	979 B	979 B	✓
withRouter.html gzip	966 B	966 B	✓
Overall change	2.92 kB	2.92 kB	✓

---

Serverless Mode

General

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
buildDuration	14s	14.1s	⚠️ +125ms
nodeModulesSize	56.7 MB	56.7 MB	✓

Client Bundles (main, webpack, commons)

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
677f882d2ed8..7362.js gzip	10.6 kB	10.6 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-979126c..02f7.js gzip	7.08 kB	7.08 kB	✓
webpack-e067..f178.js gzip	751 B	751 B	✓
Overall change	57.4 kB	57.4 kB	✓

Client Bundles (main, webpack, commons) Modern

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
677f882d2ed8..dule.js gzip	6.51 kB	6.51 kB	✓
framework.HA..dule.js gzip	39 kB	39 kB	✓
main-e37c8f7..dule.js gzip	6.14 kB	6.14 kB	✓
webpack-07c5..dule.js gzip	751 B	751 B	✓
Overall change	52.4 kB	52.4 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
polyfills-4b..e242.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_app-9a0b9e1..b37e.js gzip	1.28 kB	1.28 kB	✓
_error-ed1b0..8fbd.js gzip	3.44 kB	3.44 kB	✓
hooks-89731c..c609.js gzip	887 B	887 B	✓
index-17468f..5d83.js gzip	227 B	227 B	✓
link-d2344ce..8b36.js gzip	1.3 kB	1.3 kB	✓
routerDirect..924c.js gzip	284 B	284 B	✓
withRouter-7..c13d.js gzip	284 B	284 B	✓
Overall change	7.71 kB	7.71 kB	✓

Client Pages Modern

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_app-75d3a82..dule.js gzip	625 B	625 B	✓
_error-4469a..dule.js gzip	2.29 kB	2.29 kB	✓
hooks-cbf13f..dule.js gzip	387 B	387 B	✓
index-b9a643..dule.js gzip	226 B	226 B	✓
link-f8c0daf..dule.js gzip	1.26 kB	1.26 kB	✓
routerDirect..dule.js gzip	284 B	284 B	✓
withRouter-f..dule.js gzip	282 B	282 B	✓
Overall change	5.36 kB	5.36 kB	✓

Client Build Manifests

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_buildManifest.js gzip	322 B	322 B	✓
_buildManife..dule.js gzip	329 B	329 B	✓
Overall change	651 B	651 B	✓

Serverless bundles

	vercel/next.js canary	piotrzarycki/next.js bugfix/example-app	Change
_error.js	1.03 MB	1.03 MB	✓
404.html	4.22 kB	4.22 kB	✓
hooks.html	3.86 kB	3.86 kB	✓
index.js	1.03 MB	1.03 MB	✓
link.js	1.08 MB	1.08 MB	✓
routerDirect.js	1.07 MB	1.07 MB	✓
withRouter.js	1.07 MB	1.07 MB	✓
Overall change	5.29 MB	5.29 MB	✓

Commit: 7865978