fix(doc): use colon instead of equals sign in session properties

Signed-off-by: divinerapier <[email protected]>

Author: divinerapier

README.md

@@ -256,7 +256,7 @@ http://user@localhost:8080?source=hello&catalog=default&schema=foobar
 ```
 
 ```
-https://user@localhost:8443?session_properties=query_max_run_time=10m,query_priority=2
+https://user@localhost:8443?session_properties=query_max_run_time:10m;query_priority:2
 ```
 
 ## Data types