Rebrand ownership references from Functional Software/Sentry to Harness (#69)

Codecov is now owned by Harness, Inc. following the 2026 acquisition.
Update user-facing ownership/branding references that named Sentry's
legal entity (Functional Software, Inc. dba Sentry) or the Sentry parent
company. Legitimate Sentry-product references are left unchanged.

Author: thomasrockhu-codecov

LICENSE.md

@@ -6,7 +6,7 @@ FSL-1.0-Apache-2.0
 
 ## Notice
 
-Copyright 2008-2023 Functional Software, Inc. dba Sentry
+Copyright 2008-2026 Harness, Inc.
 
 ## Terms and Conditions