v1.2.0 to use correct NANO33BLE_FS_START

### Releases v1.2.0

1. Use correct NANO33BLE_FS_START address without wasting flash space. Check [Half size of flash #2](#2)
2. Enforce min 64KB / max 512KB of flash used for LittleFS by auto-adjusting NANO33BLE_FS_SIZE_KB if defined smaller than 64KB or larger than 512KB
3. Enforce 512KB of flash used for FATFS by auto-adjusting NANO33BLE_FS_SIZE_KB if defined different from 512KB
4. Update all examples

Author: khoih-prog

README.md

@@ -28,7 +28,7 @@
 * [Debug Terminal Output Samples](#debug-terminal-output-samples)
   * [1. FS_Counting on Nano 33 BLE with LittleFS size 256KB](#1-fs_counting-on-nano-33-ble-with-littlefs-size-256kb)
   * [2. FS_Test on Nano 33 BLE with LittleFS size 256KB](#2-fs_test-on-nano-33-ble-with-littlefs-size-256kb)
-  * [3. FS_Test on Nano 33 BLE with FATFS size 256KB](#3-fs_test-on-nano-33-ble-with-fatfs-size-256kb)
+  * [3. FS_Test on Nano 33 BLE with FATFS size 512KB](#3-fs_test-on-nano-33-ble-with-fatfs-size-512kb)
 * [Debug](#debug)
 * [Troubleshooting](#troubleshooting)
 * [Issues](#issues)