CI is red on recent PRs

[moul]

Can someone with guide's backend experience give a look, please?

[ajnavarro]

Spellchecks are failing:

docs/engineering/workflows/taskforce-warzone.md
     1:3-1:12  warning  `Taskforce` is misspelt                  taskforce      retext-spell
    1:13-1:20  warning  `Warzone` is misspelt                    warzone        retext-spell
     4:1-4:10  warning  `Taskforce` is misspelt; did you mean ?  taskforce      retext-spell
    4:11-4:18  warning  `Warzone` is misspelt; did you mean ?    warzone        retext-spell
    6:37-6:47  warning  `hackathons` is misspelt                 hackathons     retext-spell
  31:40-31:53  warning  `recalibration` is misspelt              recalibration  retext-spell

Fixed dependency problem on #35