Fix typo: getBatteryPrecentage -> getBatteryPercentage

[mochipon]

closes #37

[codecov]

Codecov Report

Merging #55 (34e865b) into main (7a0af70) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   93.75%   93.79%   +0.04%     
==========================================
  Files           8        8              
  Lines        1136     1144       +8     
==========================================
+ Hits         1065     1073       +8     
  Misses         71       71              

Impacted Files	Coverage Δ
pysesameos2/helper.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7a0af70...34e865b. Read the comment docs.