[CI] GH action config tweak: spell-check all files

[chalin]

• Fixes [CI] cSpell GitHub action doesn't always check files in a PR #4963, I hope
• It won't take that much longer to check all files rather than let the plugin figure out which file list to check

[cartermp]

Certainly no harm in this, either.

[chalin]

Certainly no harm in this, either.

Right. It checks all the files in a couple of seconds:

Run streetsidesoftware/cspell-action@v6
cspell-action
Pull Request
Files checked: 820, Issues found: 0 in 0 files.