[MWAN] Update details in oracle

[leo-ars]

Summary

Changed the way we suggest to generate the psk with code/workers

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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