ports/psoc6/README.md: Added MTB version limitation.

Signed-off-by: jaenrig-ifx <enriquezgarcia.external@infineon.com>

Author: jaenrig-ifx

ports/psoc6/README.md

@@ -6,7 +6,7 @@ This port is intended to run on Infineon PSoC™ 6 microcontrollers.
 
 The following port is using Infineon ModusToolbox™ to resolve the specific PSoC™ board resources and building flags. Before working with micropython:
 
-1. Install [ModusToolbox](https://softwaretools.infineon.com/tools/com.ifx.tb.tool.modustoolbox?_ga=2.77665684.1651703860.1718094141-10754106.1710937391). Minimum version required is 3.0.
+1. Install [ModusToolbox](https://softwaretools.infineon.com/tools/com.ifx.tb.tool.modustoolbox). **The required version is 3.0**. The version is currently fixed as some future versions are incompatible.
 
 2. Run the following script from MicroPython repository root to add the required tools to the system PATH, and install the udev rules: