Pull request project-chip#2101: MATTER-3617: Fix submodule checkout example

Merge in WMN_TOOLS/matter from documentation_fix/smg_2.3.1-1.3 to RC_2.3.1-1.3

Squashed commit of the following:

commit 23e0930c8f557d2603f9adb7cc646b6716f9981a
Author: Rehan Rasool <Rehan.Rasool@silabs.com>
Date:   Tue Jan 28 08:45:58 2025 -0500

    Fix documentation arguments

Author: rerasool

docs/silabs/general/OTA_SOFTWARE_UPDATE.md

@@ -40,7 +40,7 @@ application images.
 
     ```shell
     $ cd matter
-    $ ./scripts/checkout_submodules.py --shallow --recursive --platform efr32
+    $ ./scripts/checkout_submodules.py --shallow --recursive --platform silabs
     $ . scripts/bootstrap.sh
     # Create a directory where binaries will be updated/compiled called `out`
     $ mkdir out

docs/silabs/general/SOFTWARE_REQUIREMENTS.md

@@ -45,7 +45,7 @@
     ```
 
     ```shell
-    $ ./scripts/checkout_submodules.py --shallow --recursive --platform efr32
+    $ ./scripts/checkout_submodules.py --shallow --recursive --platform silabs
     ```
 
 6. If you are using an EFR32MG2x device you will require a bootloader to run the

docs/silabs/wifi/SW_SETUP.md

@@ -19,7 +19,7 @@ application images. Users may need to run the various commands as the root user
 
     ```shell
     $ cd matter
-    $ ./scripts/checkout_submodules.py --shallow --recursive --platform efr32
+    $ ./scripts/checkout_submodules.py --shallow --recursive --platform silabs
     $ . scripts/bootstrap.sh
     # Create a directory where binaries will be updated/compiled called `out`
     $ mkdir out