fix(ConventionalCommitsCz): cz's schema validates the whole commit message now

Author: Bogay

commitizen/cz/conventional_commits/conventional_commits.py

@@ -191,8 +191,11 @@ def schema(self) -> str:
 
     def schema_pattern(self) -> str:
         PATTERN = (
-            r"(build|ci|docs|feat|fix|perf|refactor|style|test|chore|revert|bump)"
-            r"(\(\S+\))?!?:(\s.*)"
+            r"(?s)"  # To explictly make . match new line
+            r"(build|ci|docs|feat|fix|perf|refactor|style|test|chore|revert|bump)"  # type
+            r"(\(\S+\))?!?:"  # scope
+            r"( [^\n\r]+)"  # subject
+            r"((\n\n.*)|(\s*))?$"
         )
         return PATTERN