Update README.md

Author: willem-delbare

README.md

@@ -1,3 +1,5 @@
-### Welcome to Opengrep Rules, a fork of Semgrep Rules, under the LGPL 2.1 license
+### Welcome to Opengrep Rules, a fork of Semgrep Rules
 This project is a fork of Semgrep, created by Semgrep Inc. Opengrep is not affiliated with or endorsed by Semgrep Inc.
-***
+***
+
+These rules are intended for research, testing & benchmarking.