Add to PHPCS sniff paths

Fixes ERROR: Referenced sniff "VariableAnalysis" does not exist in pipelines

plugins/templates/matrix.yml

@@ -60,7 +60,13 @@ PHPCS:
   before_script:
     - composer global require automattic/vipwpcs
     - composer global require phpcompatibility/phpcompatibility-wp
-    - phpcs --config-set installed_paths $HOME/.composer/vendor/wp-coding-standards/wpcs,$HOME/.composer/vendor/automattic/vipwpcs,$HOME/.composer/vendor/phpcompatibility/php-compatibility,$HOME/.composer/vendor/phpcompatibility/phpcompatibility-paragonie,$HOME/.composer/vendor/phpcompatibility/phpcompatibility-wp
+    - phpcs --config-set installed_paths \
+        $HOME/.composer/vendor/wp-coding-standards/wpcs, \
+        $HOME/.composer/vendor/automattic/vipwpcs, \
+        $HOME/.composer/vendor/phpcompatibility/php-compatibility, \
+        $HOME/.composer/vendor/phpcompatibility/phpcompatibility-paragonie, \
+        $HOME/.composer/vendor/phpcompatibility/phpcompatibility-wp, \
+        $HOME/.composer/vendor/sirbrillig/phpcs-variable-analysis
   script:
     - phpcs -n