Merge PR #4950 from @nasbench - Comply With v2 Spec Changes

chore: change tags, date, modified fields to comply with v2 of the Sigma spec.
chore: update the related type from `obsoletes` to `obsolete`.
chore: update local json schema to the latest version.

rules/application/python/app_python_sql_exceptions.yml

@@ -5,10 +5,10 @@ description: Generic rule for SQL exceptions in Python according to PEP 249
 references:
     - https://www.python.org/dev/peps/pep-0249/#exceptions
 author: Thomas Patzke
-date: 2017/08/12
-modified: 2020/09/01
+date: 2017-08-12
+modified: 2020-09-01
 tags:
-    - attack.initial_access
+    - attack.initial-access
     - attack.t1190
 logsource:
     category: application