KOGITO-8410 Added documentation about GET requests to Knative Custom Functions

[hbelmiro]

JIRA: https://issues.redhat.com/browse/KOGITO-8410

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• https://github.com/kiegroup/kogito-runtimes/pull/3172

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[ricardozanini]

Maybe adding a note saying that the arguments are sent over query string? I know that's obvious, but....

[hbelmiro]

Maybe adding a note saying that the arguments are sent over query string? I know that's obvious, but....

Done.

[kaldesai]

@hbelmiro Your changes look good to me. Thank you.

[ricardozanini]

@radtriste we should've waited for https://github.com/kiegroup/kogito-runtimes/pull/3172

But I guess we haven't branched? If so, that PR must be cherry-picked.

[radtriste]

sorry I saw it after ...
branch was done 2 days ago already ... so there is no cherry-pick needed. it will end up in 1.44