Fix (project_access_tokens.md): types

What does this MR do and why?

Fix project and group access token_id type to int

Tokens are identified by their token_id, which is an int; string is not supported.

Consistently use lower case types, e.g Date → date.. Consistently use … or … instead of …/…. Consistently no space after colon.

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# glapi projects/3/access_tokens/748
{
    "access_level": 10,
    "active": true,
    "created_at": "2024-02-12T11:04:50.326+01:00",
    "expires_at": "2024-03-13",
    "id": 748,
    "last_used_at": "2024-02-21T13:30:39.647+01:00",
    "name": "errata-release",
    "revoked": false,
    "scopes": [
        "api"
    ],
    "user_id": 754
}
# glapi projects/3/access_tokens/errata-release
{
    "message": "404 Could not find project access token with token_id: errata-release Not Found"
}