docs: fix incorrect usage in Server Action in a Client Component example

[liby]

What?

This PR fixes an incorrect usage of the Button component in the client component example. The example mistakenly used a Button component without importing or defining it properly, whereas the intent was to use the native HTML button element.

Why?

The original example incorrectly suggested that a custom Button component was being used. However, the intent was likely to demonstrate the usage of the native button element with an onClick handler to trigger a Server Action. The existing code could lead to confusion, as it implied the existence of a custom component named Button without any clear definition or import, which would also result in a recursive component reference issue.

How?

This fix ensures that the example clearly demonstrates the intended use of the native button element with an onClick handler, aligning with best practices and avoiding potential errors or misunderstandings in component usage.

[ijjk]

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