Update the debug flag name

[AdrienPoupa]

When passing 'debug' to the StandardServer it fails:

Unknown server config option "debug" {"exception":"[object] (GraphQL\\Error\\InvariantViolation(code: 0): Unknown server config option \"debug\" at /vol/website/vendor/webonyx/graphql-php/src/Server/ServerConfig.php:50)"}

This is because the option is now called debugFlag

[coveralls]

Coverage remained the same at 86.38% when pulling e77d25d on AdrienPoupa:patch-1 into 3af8b92 on webonyx:master.

[spawnia]

@vladar what is the process for actually updating the website?

[vladar]

@spawnia It should be as simple as installing mkdocs and running mkdocs gh-deploy (in the repository root folder, see related docs).

[simPod]

So we can MB convert it into an Action to be run either on Release or Push to master 🤔