fix(validator): header-length needs a value

[sanadhis]

BUG FIX
Without specifying : we tell getopt this option doesn't need a value, hence breaking the script:

getopt: option `--header-length' doesn't allow an argument

Example use-case from infra repo:
https://github.com/lumapps/infra/blob/master/.pre-commit-config.yaml#L107

NOTE
You might experience this only with recent version of getopt (especially if you're MacOS user and install the newer version)

[noirbee]

:tink: How did this never come up before ? Is the =100 from the infra repository ignored ?

[sanadhis]

:tink: How did this never come up before ? Is the =100 from the infra repository ignored ?

I cannot really answer why 😖
One thing coming to mind is the version of getops, I have MacOS machine and just recently installed the latest version

[sanadhis]

@noirbee can you merge this for me pretty please? I can't because of the checks but not sure why the check is failing.

[noirbee]

@noirbee can you merge this for me pretty please? I can't because of the checks but not sure why the check is failing.

Sigh, it's the public vs private repository for actions failure again.

@prousso what's our status here ? Do we need to switch this repo to be a private one ?

[prousso]

I think we use it in many public repositories...
We will remove required check for github-actions-validator temporarily

[prousso]

https://github.com/lumapps/github-automation/pull/2173