docs: fix firewall_resource examples input parameters

[sebastien-dargoeuves-ipf]

In the example, we should use firewall instead of name as per the options described at the top of the documentation.

SUMMARY

I had an error on my VSCode when I used name as it was showing in the example. Looking at the documentation, it says I should be using firewall instead.
I haven't explicitly tested to see if it would have failed, but I thought replacing name with firewall was the right thing to do, as it works fine like this.

ISSUE TYPE

• Docs Pull Request

COMPONENT NAME

firewall_resource

ADDITIONAL INFORMATION

[jooola]

Thanks for the fix!