Update securing-repositories.md

Author: andyblundell

practices/securing-repositories.md

@@ -67,7 +67,7 @@ This minimum set of requirements should be implemented alongside other relevant
 
 ## Repository content
 
-- The repository must have a description(using the `About` option)
+- The repository must have a description (using the `About` option)
 - The following minimum set of files must be included in the repository, to support others to navigate the repository content:
   - README.md
   - CONTRIBUTING.md