doc: Improve CoAP component description

[apupier]

Description

Target

• I checked that the commit is targeting the correct branch (note that Camel 3 uses camel-3.x, whereas Camel 4 uses the main branch)

Tracking

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Apache Camel coding standards and style

• I checked that each commit in the pull request has a meaningful subject line and body.

• I have run mvn clean install -DskipTests locally and I have committed all auto-generated changes

[github-actions]

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[apupier]

/component-test coap

Result ✅ The tests passed successfully

[github-actions]

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[apupier]

How can I regenrate the parts in kotlin-api-dsl and camel-kotlin-api locally?

or is it fine to merge and it iwill be regenerated automatically?

[davsclaus]

you build catalog/camel-catalog
and then afterwards you can build dsl

[davsclaus]

but if you have a fast computer its easier just to

mvn clean install -P fastinstall

from root folder

[apupier]

to have the dsl/camel-componentdsl changes,using the top level mvn clean install -Pfast install was not enough. I called mvn clean install in both camel-catalog and dsl/camel-component-dsl