docs: Include the required jq dependency

[medinad96]

Motivation

Followed the quickstart and ran into "jq not found" when running the following command. Quickstart link

./scripts/install.sh --namespace modelmesh-serving --quickstart --enable-self-signed-ca

The following change made jq a necessary dependency:

modelmesh-serving/scripts/self-signed-ca.sh

Lines 136 to 139 in 91b610b

	# check if jq is installed
	if [ ! -x "$(command -v jq)" ]; then
	echo "jq not found"
	exit 1

Modifications

Modified the list under the following link to point to where jq can be downloaded or installed https://github.com/kserve/modelmesh-serving/blob/main/docs/quickstart.md#prerequisites

Result

The prerequisites list has the link detailed below.

[rafvasq]

Thanks @medinad96! Can you please follow the instructions here to sign off your commit (DCO)?

[rafvasq]

I think you can also add a sentence to the end of this line explaining the self-signed script here and mention that jq is required for that script.

[oss-prow-bot]

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[oss-prow-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: medinad96, rafvasq

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [rafvasq]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[rafvasq]

/lgtm