Zephyr: Bump cmake dependency (#18633)

Updated the cmake dependecy v3.29 -> v<4.0.0,
this is due to PyPI not finding 3.29 anymore

Signed-off-by: Christoffer J.L <christoffer.johanssonlundqvist@arm.com>

Author: Christoffer-JL

zephyr/README.md

@@ -17,7 +17,7 @@ source .zephyr_venv/bin/activate
 Install requirements
 <!-- RUN install_reqs -->
 ```
-pip install west cmake==3.29 pyelftools ninja jsonschema
+pip install west "cmake<4.0.0" pyelftools ninja jsonschema
 ```
 
 Setup zephyr repo