Fix generator template broken link

[Florence-Njeri]

Description
The last link on the generator template link is broken and odd:
https://www.asyncapi.com/docs/tools/generator/(https://medium.com/python-point/mqtt-basics-with-python-examples-7c758e605d4)

Related issue(s)
Fixes#

[asyncapi-bot]

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[sonarqubecloud]

Quality Gate passed

Issues
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