Minor doc cleanup

[LiptonB]

Update a few docs with grammatical fixes, minor edits for clarity, and some fixes for non-rendering OpenFGA code

Description

I'm a new OpenFGA user and when reading the docs I noticed a few things that appeared to be typos or were slightly unclear. I also noticed that a few of the code snippets did not render correctly, for example this one on https://openfga.dev/docs/modeling/advanced/gdrive:

In this PR I've attempted improve the things I noticed, but I am not an expert in the project, so just let me know if you'd like me to change anything.

References

N/A

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• (N/A) I have added tests to validate that the change in functionality is working as expected

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: LiptonB / name: Ben Lipton (87dd29e, b0f3d5e, 9473919, c910baf, 941676d)
• ✅ login: adriantam / name: Adrian Tam (01db25a, a122752)

[adriantam]

@LiptonB , thank you for your contribution