[bootlin/training-materials updates] master: lab-data: bbb-recovery: Mention why the cable needs to be unplugged (38304062)

[Miquel Raynal]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/383040625c4abdadf5f3621c52289faa27062622

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commit 383040625c4abdadf5f3621c52289faa27062622
Author: Miquel Raynal <miquel.raynal at bootlin.com>
Date:   Wed Jul 19 15:35:44 2023 +0200

    lab-data: bbb-recovery: Mention why the cable needs to be unplugged
    
    Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>


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383040625c4abdadf5f3621c52289faa27062622
 lab-data/common/bootloader/beaglebone-black/README.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lab-data/common/bootloader/beaglebone-black/README.txt b/lab-data/common/bootloader/beaglebone-black/README.txt
index 7dacb612..e745e007 100644
--- a/lab-data/common/bootloader/beaglebone-black/README.txt
+++ b/lab-data/common/bootloader/beaglebone-black/README.txt
@@ -64,7 +64,8 @@ Then from the host, flash the image:
 
     $ snagflash -P fastboot -p 0451:d022 -f oem_format -f download:sdcard.img -f flash:1:0
 
-Reboot by unplugging the power supply cable, and enjoy the training!
+Reboot by unplugging the power supply cable (just resetting won't change
+the boot source), and enjoy the training!
 
 =========================================
 2b. Flash the image using a micro-SD card