ICU-22533 Update badges for CI pipelines, user guide docs about CI

[echeran]

Checklist

• Required: Issue filed: https://unicode-org.atlassian.net/browse/ICU-22533
• Required: The PR title must be prefixed with a JIRA Issue number.
• Required: The PR description must include the link to the Jira Issue, for example by completing the URL in the first checklist item
• Required: Each commit message must be prefixed with a JIRA Issue number.
• Issue accepted (done by Technical Committee after discussion)
• Tests included, if applicable
• API docs and/or User Guide docs changed or added, if applicable

[markusicu]

lgtm except still-existing typo

[markusicu]

Suggested change

	In order to set up a pipeline, a person must simultaneously has access to the Azure Pipelines project for ICU and to the Github ICU repository.
	In order to set up a pipeline, a person must simultaneously have access to the Azure Pipelines project for ICU and to the Github ICU repository.

[echeran]

Done.

[jira-pull-request-webhook]

Notice: the branch changed across the force-push!

• docs/userguide/dev/ci.md is different

View Diff Across Force-Push

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