feat: add parameter to use custom CA file

[camandel]

I added the optional parameter ca_file to use custom CA certificate:

provider "pihole" {
  url = "https://pihole.your.home.local"
  api_token = var.pihole_api_token
  ca_file = "/path/to/your/ca.crt"
}

[ryanwholey]

Nice thank you! I'm on paternity leave right now, I'm a bit slow to respond but I'll take a look asap

[ryanwholey]

hmm lint rot issue, I don't think it's your PR. Thanks for the contribution @camandel

[ryanwholey]

Bleh looks like the releaser action has rotted a bit too. Created some issues (release, lint) for these two action failures and hopefully we can get this released soon.

[ryanwholey]

@camandel finally got your CA file change released! Sorry it took so long