docs: added an apt update to measuring_resonance (#4417)

Signed-off-by: Ben Eastep <shifting@shifting.ca>
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shiftingtech 2021-07-08 08:38:12 -06:00 committed by GitHub
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@ -76,8 +76,9 @@ CPU, it may take *a lot* of time, up to 10-20 minutes. Be patient and wait
for the completion of the installation. On some occasions, if the board has
too little RAM, the installation may fail and you will need to enable swap.
Next, run the following command to install the additional dependencies:
Next, run the following commands to install the additional dependencies:
```
sudo apt update
sudo apt install python-numpy python-matplotlib
```