Fixed "JWT" run-on sentence

Author: eryno

security-checklist.md

@@ -27,7 +27,7 @@
 - [ ] Any upload feature should sanitize the filename provided by the user. Also, for generally reasons apart from security, upload to something like S3 (and post-process using lambda) and not your own server capable of executing code.  
 - [ ] `Profile photo upload` feature should sanitize all the `EXIF` tags also if not required.
 - [ ] For user ids and other ids, use [RFC compliant ](http://www.ietf.org/rfc/rfc4122.txt) `UUID` instead of integers. You can find an implementation for this for your language on Github.
-- [ ] JWT are awesome, use them if required for your single page app/APIs.
+- [ ] JWT are awesome. Use them if required for your single page app/APIs.
 
 
 ##### ANDROID / IOS APP