[FIX] GO code documentation maintenance

[LuisZanella]

Instructions: Add any supporting information, such as a description of the PR changes, here.
I tried to run the code as it was but it doesn't find the types declaration inside my own function, also seems that ParseISODuration is not part of abstraction, I tried with old versions but that didn't work as well.

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[learn-build-service-prod]

Learn Build status updates of commit 6173a76:

✅ Validation status: passed

File	Status	Preview URL	Details
api-reference/v1.0/includes/snippets/go/user-findmeetingtimes-go-snippets.md	✅Succeeded

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[Lauragra]

@andrueastman , can you take a look at this PR please? Do we need to file a bug in the Go SDK?

[andrueastman]

@Lauragra Yes. This is what we should do.

@LuisZanella Any chance you can file an issue in the GO SDK with the doc link attached and the issue with the doc? https://github.com/microsoftgraph/msgraph-sdk-go/issues