ci(): allow lowercase for commits

Author: kamilmysliwiec

.commitlintrc.json

@@ -4,7 +4,7 @@
     "subject-case": [
       2,
       "always",
-      ["sentence-case", "start-case", "pascal-case", "upper-case"]
+      ["sentence-case", "start-case", "pascal-case", "upper-case", "lower-case"]
     ]
   }
 }