Add editorconfig-checker workflow

Add yml style to editorconfig
Add markdown styling to editorconfig

Signed-off-by: Christian König <ckoenig@posteo.de>

advanced/Scripts/database_migration/gravity/3_to_4.sql

@@ -93,4 +93,4 @@ CREATE VIEW vw_regex_blacklist AS SELECT domain, domainlist.id AS id, domainlist
 
 UPDATE info SET value = 4 WHERE property = 'version';
 
-COMMIT;
+COMMIT;