[Docs] Sample 5: move the text about the planner just after the planner output

[eduardogoncalves]

In Sample 5, I moved the text about the planner just after the planner output, as it feels like a better fit.

Contribution Checklist

• [x] The code builds clean without any errors or warnings
• [x] The PR follows SK Contribution Guidelines (https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
• [x] I didn't break anyone :smile:

[eduardogoncalves]

@microsoft-github-policy-service agree

[eduardogoncalves]

@alexchaomander, thank you for your feedback! I agree that breaking up the sentence into multiple ones will make it easier to read and understand, I will revise it.