Update input bindings in Temperature converter 7GUIs example

[anubra266]

Description of Problem

In the Temperature Converter (7GUIs) example, the inputs still use the @change directive, so it doesn't work.

Proposed Solution

I updated them to use the @input directive.

Additional Information

I just learnt vue between yesterday and today, I was practicing the examples when I encountered this, so I appreciate any feedback.

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[skirtles-code]

Thanks for the PR!

I saw the conversation about this on Vue Land. Based on that I believe this was simply a misunderstanding and no change is actually required.

[ElMassimo]

@skirtles-code What was the discussion in Vue Land?

By using change, typing in the input does not reflect the value, making the example less interactive (and would seem like a bug to most users).

For reference, the Svelte demo uses input instead of change.