Updated README.md file with corrected slot size and address

matter/efr32/bootloader_binaries/README.md

@@ -4,10 +4,8 @@ This directory contains Silicon Labs Gecko Bootloader binaries that can be used
 
 - The external storage (SPI flash) bootloaders are configured with the slot size of 1024K 
 - The internal storage bootloaders (supported on MG24 cards only) are configured as follows:
-  - Slot Address: 135184384 (0x080ec000)
-  - Slot Size: 548864
+  - Slot Address: 135176192 (0x080ea000)
+  - Slot Size: 557056
 - All bootloaders supports LZMA compression
 - For MG12 boards use the <name>-combined.s37 (e.g. bootloader-storage-spiflash-single-1024k-BRD4161A-gsdk4.1-combined.s37) bootloader version the first time a device is programmed, whether during development or manufacturing. For subsequent programming, if the "combined" bootloader had been previously flashed to the device use the regular version (<name>.s37, e.g. bootloader-storage-spiflash-single-1024k-BRD4161A-gsdk4.1.s37). 
 - The bootloaders are compatible with Matter applications built with GSDK 4.1. Bootloaders for Matter applications built with GSDK 3.1 can be found here: https://github.com/SiliconLabs/sdk_support/tree/cf743ca3cca307ddb209c45f62aed7dc5d8ce06d/platform/bootloader/sample-apps/bootloader-storage-spiflash-single .
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