Mycroft-config: Fix deprecated --tempfile in nano

[Tony763]

Description

As described in Issue #3124, --tempfile was deprecated in Nano version 5.0.

Switching to --saveonexit would break function on older versions (Ubuntu 20.04 LTS use 4.8 version).

Thankfully, the short version of those two is still the same -t. Using it will preserve function on older systems and fix function on newer ones.

How to test

Try to edit config.

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[codecov-commenter]

Codecov Report

Base: 54.05% // Head: 54.04% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (d1b9fa2) compared to base (48dd100).
Patch has no changes to coverable lines.

❗ Current head d1b9fa2 differs from pull request most recent head c4ac8ba. Consider uploading reports for the commit c4ac8ba to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3140      +/-   ##
==========================================
- Coverage   54.05%   54.04%   -0.01%     
==========================================
  Files         120      120              
  Lines       11032    11032              
==========================================
- Hits         5963     5962       -1     
- Misses       5069     5070       +1     

Impacted Files	Coverage Δ
mycroft/client/speech/listener.py	48.04% <0.00%> (-0.36%)	⬇️

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[devops-mycroft]

Voight Kampff Integration Test Failed (Results).
Mycroft logs are also available: skills.log, audio.log, voice.log, bus.log, enclosure.log