docs: add compatibility to readme

README.md

@@ -6,6 +6,16 @@ There are plenty of versions you can browse:
 1. Branch `develop` refers to the latest version
 2. Tagged versions (ex. `1.3.1`) refers to the specific release
 
+# Compatibility
+
+## VMware Tanzu Application Service versions
+
+Splunk Firehose Nozzle has been tested on `v3.0`, `v4.0`, `v5.0` and `v6.0` of Tanzu Application Service.
+
+## VMware Ops Manager version
+
+Splunk Firehose Nozzle has been tested on `v3.0.9 LTS` of VMware Ops Manager
+
 # Maintenance And Support
 
 Splunk Firehose Nozzle project is supported through Splunk Support assuming the customer has a current Splunk support entitlement.  For customers that do not have a current Splunk support entitlement, please file an issue at [create a new issue](https://github.com/cloudfoundry-community/splunk-firehose-nozzle/issues/new/choose)