update license description

Author: daibhin

LICENSE

@@ -22,7 +22,8 @@ SOFTWARE.
 
 ---
 
-Portions of this codebase are derived from getsentry/sentry-javascript by Software, Inc. dba Sentry
+Some files in this codebase contain code from getsentry/sentry-javascript by Software, Inc. dba Sentry.
+In such cases it is explicitly stated in the file header. This license only applies to the relevant code in such cases.
 
 MIT License
 

posthog/exception_capture.py

@@ -1,6 +1,8 @@
 # Portions of this file are derived from getsentry/sentry-javascript by Software, Inc. dba Sentry
 # Licensed under the MIT License
 
+# 💖open source (under MIT License)
+
 import logging
 import sys
 import threading

posthog/exception_integrations/django.py

@@ -1,6 +1,8 @@
 # Portions of this file are derived from getsentry/sentry-javascript by Software, Inc. dba Sentry
 # Licensed under the MIT License
 
+# 💖open source (under MIT License)
+
 import re
 import sys
 from typing import TYPE_CHECKING

posthog/exception_utils.py

@@ -1,5 +1,6 @@
 # Portions of this file are derived from getsentry/sentry-javascript by Software, Inc. dba Sentry
 # Licensed under the MIT License
+
 # copied and adapted from https://github.com/getsentry/sentry-python/blob/269d96d6e9821122fbff280e6a26956e5ed03c0b/sentry_sdk/utils.py#L689
 # 💖open source (under MIT License)
 # We want to keep payloads as similar to Sentry as possible for easy interoperability