update variables read-me

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

Author: arthurjolo

docs/user/FlowVariables.md

@@ -114,8 +114,8 @@ configuration file.
 | <a name="CTS_ARGS"></a>CTS_ARGS| Override `clock_tree_synthesis` arguments.| | |
 | <a name="CTS_BUF_DISTANCE"></a>CTS_BUF_DISTANCE| Distance (in microns) between buffers.| | |
 | <a name="CTS_BUF_LIST"></a>CTS_BUF_LIST| List of cells used to construct the clock tree. Overrides buffer inference.| | |
-| <a name="CTS_CLUSTER_DIAMETER"></a>CTS_CLUSTER_DIAMETER| Maximum diameter (in microns) of sink cluster.| 50| |
-| <a name="CTS_CLUSTER_SIZE"></a>CTS_CLUSTER_SIZE| Maximum number of sinks per cluster.| 20| |
+| <a name="CTS_CLUSTER_DIAMETER"></a>CTS_CLUSTER_DIAMETER| Maximum diameter (in microns) of sink cluster.| | |
+| <a name="CTS_CLUSTER_SIZE"></a>CTS_CLUSTER_SIZE| Maximum number of sinks per cluster.| | |
 | <a name="CTS_LIB_NAME"></a>CTS_LIB_NAME| Name of the Liberty library to use in selecting the clock buffers.| | |
 | <a name="CTS_SNAPSHOT"></a>CTS_SNAPSHOT| Creates ODB/SDC files prior to clock net and setup/hold repair.| | |
 | <a name="DESIGN_NAME"></a>DESIGN_NAME| The name of the top-level module of the design.| | |