Fix broken link to examples

[tatsuyafujisaki]

On the following page, clicking "Examples" shows 404 Not Found. This pull request fixes it.
https://pub.dev/documentation/grpc/latest/

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: tatsuyafujisaki / name: Tatsuya Fujisaki (db9d281)
• ✅ login: mosuem / name: Moritz (f374023, ba21572)

[kevmoo]

Thank you!

[github-actions]

PR Health

Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
grpc	None	4.0.2	4.0.2	4.0.2	✔️

Coverage ✔️

File	Coverage

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API leaks ⚠️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbols
grpc	$1.Duration ServerHandler Any

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Package publish validation ✔️

Package	Version	Status
package:grpc	4.0.2	ready to publish

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[mosuem]

Link seems to work fine - closing for now.

[tatsuyafujisaki]

@mosuem
No, it doesn't.

Please follow these steps to reproduce the problem ...

1. Open https://pub.dev/documentation/grpc/latest/ in Chrome.
2. Click "Examples" and the 404 Not Found page will appear.

... or watch the screencast below.

screencast.mp4

[mosuem]

You are right! Thanks for noticing.

[mosuem]

Landed this as part of #732 - thanks @tatsuyafujisaki !