fix racf passticket setup based on tests

[pablocarle]

Describe your pull request here:

Fix typos and missing command in RACF setup of PassTickets

List the file(s) included in this PR:

• versioned_docs/version-v2.18.x/user-guide/api-mediation/configuration-extender-passtickets.md
• docs/user-guide/api-mediation/configuration-extender-passtickets.md

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[janan07]

I'm verifying with Rose if she can validate the broken Office Hours presentation link in zowe-v3-office-hours. I will apply this link fix in a separate PR.