updated tas info (#376)

Author: sbylica-splunk

README.md

@@ -5,7 +5,7 @@ Cloud Foundry Firehose-to-Splunk Nozzle
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 ### VMware Tanzu Application Service version
-Splunk Firehose Nozzle has been tested on v3.0.0 and v4.0.0 of Tanzu Application Service
+Splunk Firehose Nozzle has been tested on v3.0, v4.0, v5.0 and v6.0 of Tanzu Application Service
 
 - - - -