Update README.md

jfleming-ic · zegelin · commit e6da3f19107e · 2022-07-22T14:40:43.000+10:00
Update README to include note that Cassandra 4.0 is unsupported.
diff --git a/README.md b/README.md
@@ -4,6 +4,8 @@
 
 *Project Status: beta*
 
+# Note - The Cassandra-Exporter tool does not support Cassandra 4.0 or newer, see the compatibility section for more details on supported versions.
+
 
 ## Introduction
 
