update java read me (#11269)

specification/healthcareapis/resource-manager/readme.java.md

@@ -16,11 +16,25 @@ output-folder: $(azure-libraries-for-java-folder)/azure-mgmt-healthcareapis
 
 ``` yaml $(java) && $(multiapi)
 batch:
+  - tag: package-2020-03-30
   - tag: package-2020-03
   - tag: package-2019-09  
   - tag: package-2018-08-preview
 ```
 
+### Tag: package-2020-03-30 and java
+
+These settings apply only when `--tag=package-2020-03-30 --java` is specified on the command line.
+Please also specify `--azure-libraries-for-java=<path to the root directory of your azure-sdk-for-java clone>`.
+
+``` yaml $(tag) == 'package-2020-03-30' && $(java) && $(multiapi)
+java:
+  namespace: com.microsoft.azure.management.healthcareapis.v2020_03_30
+  output-folder: $(azure-libraries-for-java-folder)/sdk/healthcareapis/mgmt-v2020_03_30
+regenerate-manager: true
+generate-interface: true
+```
+
 ### Tag: package-2020-03 and java
 
 These settings apply only when `--tag=package-2020-03 --java` is specified on the command line.