CSPELL ignores files in hidden folders

Migrated issue

Reported by: jonathan1055

Related to !224 (merged)

Problem/Motivation

The CSPELL job does not check some files which we might want to be included. For example, a project's tugboat build config file is stored in .tugboat/config.yml

Proposed resolution

Following a discussion on Slack, we discovered that adding the --dot option via _CSPELL_EXTRA is not sufficient to get the file included.