GitLabCI: Fix existing CSpell issues

Problem/Motivation

$CI_PROJECT_DIR/$_WEB_ROOT/core/node_modules/.bin/cspell -c .cspell.json --show-suggestions --show-context --no-progress $_CSPELL_EXTRA $CSPELL_SEARCH || EXIT_CODE=$?
./src/Plugin/ConfigDistroFilterInterface.php:11:19     - Unknown word (specialised) -- * or allow for a specialised workflow that is outside
	 Suggestions: [specialized, specialism, specialist, specialize, specialisms]
./tests/modules/config_distro_test/src/Plugin/ConfigFilter/PirateFilter.php:8:40      - Unknown word (Arrr)       -- pirate filter that adds "Arrr" to the site name.
	 Suggestions: [Rarr, rArr, Arr, Rar, Rara]
./tests/modules/config_distro_test/src/Plugin/ConfigFilter/PirateFilter.php:12:29     - Unknown word (Arrr)       -- label = "More pirates! Arrr",
	 Suggestions: [Rarr, rArr, Arr, Rar, Rara]
./tests/modules/config_distro_test/src/Plugin/ConfigFilter/PirateFilter.php:24:41     - Unknown word (Arrr)       -- = $data['name'] . ' Arrr';
	 Suggestions: [Rarr, rArr, Arr, Rar, Rara]
CSpell: Files checked: 33, Issues found: 4 in 2 files.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes