Update README.md

Author: sofietoft

security-and-privacy/README.md

@@ -1,5 +1,5 @@
 # Security and Privacy
 
-This is a documentation site for documenting Security and Privacy best practices.
+This is a documentation site for documenting best practices in security and privacy.
 
 Please follow our [Documentation Style Guide](https://docs.umbraco.com/contributing/documentation/style-guide) when building this documentation site.