OpenID Connect Tokens does not talk about access_token

[akankshakumari393]

In this page https://kubernetes.io/docs/reference/access-authn-authz/authentication/#openid-connect-tokens we mentioned about manually login to IDP and getting Id_token, access_token and refresh_token, but we use only id_token further and there is no mention for access_token. We should add a point about it.

[akankshakumari393]

/sig docs

[akankshakumari393]

/language en

[sftim]

/sig auth
/sig security

[stlaz]

/assign @aramase
/triage accepted