[FE training-materials-updates] README.txt: fix typo

[Thomas Petazzoni]

Repository : git://git.free-electrons.com/training-materials.git
On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=3adc955bac5bf955743535428206de7061699132

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commit 3adc955bac5bf955743535428206de7061699132
Author: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date:   Tue Dec 27 16:20:54 2016 +0100

    README.txt: fix typo
    
    Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>


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3adc955bac5bf955743535428206de7061699132
 lab-data/common/bootloader/beaglebone-black/README.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lab-data/common/bootloader/beaglebone-black/README.txt b/lab-data/common/bootloader/beaglebone-black/README.txt
index 6da7e4b..4091391 100644
--- a/lab-data/common/bootloader/beaglebone-black/README.txt
+++ b/lab-data/common/bootloader/beaglebone-black/README.txt
@@ -108,9 +108,9 @@ available either.
 Should you need more standard tools, you may boot the board with
 an MMC card with Debian on it (see http://beagleboard.org/latest-images).
 
-===============================
-How the binaries where compiled
-===============================
+==============================
+How the binaries were compiled
+==============================
 
 Caution: instructions for people already familiar with embedded Linux.
 See our Embedded Linux course (http://free-electrons.com/training/embedded-linux/)