Update known_issues.md

doc/known_issues.md

@@ -1,10 +1,11 @@
 # Known issues
 
-None of the issues  listed below are critical
+List of known issues with DHIS2 and the package. **None** of the issues listed below are critical or will block an implementation of the package
 
 ## DHIS2 limitations
 - Adding a new event to a stage in Web Capture [issue](https://dhis2.atlassian.net/browse/DHIS2-16885)
 - Incorrect SQL formatter for an indicator [issue](https://dhis2.atlassian.net/browse/DHIS2-17789)
 
+
 ## Package limitations
 - If a patient visits with no BP or blood sugar reading taken, the patient should be counted in the missed visit indicator. A visit is defined as a patient having a BP or blood sugar reading was taken. In the current package, the patient is not considered as a missed visit and instead the most recent visit with a BP or blood sugar reading is considered (making the patient either BP/blood sugar controlled or BP/blood sugar uncontrolled).