docs: fix jq query to get gitea token

[marcorichetta]

Hi!

I was following the tutorial and when trying to get the gitea token I found some errors on the jq queries.

❯ ./idpbuilder version                                          
idpbuilder 0.9.0 go1.22.12 linux/amd64

❯ ./idpbuilder get secrets -p gitea -o json                     
[
  {
    "IsCore": true,
    "name": "gitea-credential",
    "namespace": "gitea",
    "username": "giteaAdmin",
    "password": "K.d!X2<L?7hr%}7'^lJui%5xSV%KxzV9dsNq5M5S",
    "token": "6db62e19d94439543e100d6b6d240d6e3a242a41"
  }
]

# Current
❯ ./idpbuilder get secrets -p gitea -o json | jq -r '.[0].data.token'
null

# Fixed
❯ ./idpbuilder get secrets -p gitea -o json | jq -r '.[0].token'     
6db62e19d94439543e100d6b6d240d6e3a242a41