Typo in link to 'implementing a Hello World http server'.

[vprusso]

In dart_io_mini_samples/README.md the link directory to the example "Implementing a 'Hello world' HTTP server" was not listed properly. Specifically, the "h" and "w" in the word "helloworld" were lowercase, when they should have been uppercase. Fixing this prevent a 404 error from occurring when attempting to navigate to this example.

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[kevmoo]

@kwalrath – do we have an official owner here?

[vprusso]

Hey @kevmoo sorry about the trouble there. I committed this to a different machine and the user I had globally set was different than the one I used to fork. That's completely on me, sorry for the trouble there.

[kevmoo]

@vprusso – no trouble 😄

[kwalrath]

@kevmoo No, no official owner. This repo was originally the source of dartlang.org/docs/cookbook, which we removed recently (#687) because the code wasn't being updated or tested.

[kwalrath]

The following pages still have references to this repo:

• https://www.dartlang.org/dart-vm
• https://www.dartlang.org/dart-vm/io-library-tour#more-information

src/_data/samples.yaml also refers to it, but I believe that file isn't used right now.